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Published by WeatherVerity

Weather in Istanbul

Republic of Türkiye
41.0138 °, 28.9497 °

All dates and times below are local to Istanbul (Europe/Istanbul).

Compare locations

Current conditions

Model estimate
26°C

Clear sky

Feels like
26 °C
Humidity
55 %
Wind speed
4.7 m/s
Wind from
NE · 35 °
Precipitation (15 min)
0 mm
Valid at Retrieved Underlying forecast data: Open-Meteo

Today at a glance

It gets cooler from 17:00 GMT+3 to 23:00 GMT+3, from 26.1 to 20.9 °C.

Forecast hours ahead in Istanbul, 17:00 GMT+3–23:00 GMT+3 local time: 20.9 °C – 26.1 °C · up to 0% precipitation risk · wind up to 4.9 m/s.

Best upcoming time outside: – · 98/100 →

Facts behind this summary

Calculated by WeatherVerity from the forecast data shown on this page. Underlying forecast data: Open-Meteo · Hourly retrieved: · Europe/Istanbul

The first card shows the best upcoming or recommended two-hour period. The second shows the least favorable period. The full-day best, timeline and special weather windows are supporting details.

Best & worst time outside

General outdoor activity · 2 consecutive hours · Europe/Istanbul

Today ·

Best upcoming time outside · Today

98/100 · Excellent

  • Light wind · Wind up to 2.7 m/s
  • Temperatures within the activity range · 20.7 °C – 21.2 °C
  • Low precipitation risk · Up to 0% precipitation risk

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Least favorable time outside · Today

84/100 · GreatStill good outdoors

  • 26.1 °C – 27.3 °C
  • Wind up to 4.7 m/s
  • Low precipitation risk · Up to 0% precipitation risk

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

No truly poor periods in this day’s complete forecast.

Full-day details

Highest score over the full day · 98/100 · Already passed

Today covers the whole local day, including periods that have already passed.

00:00 is the end of the selected day.

Selected upcoming two-hour window for general outdoor activity in Istanbul on 12 Sept 2026: 22:00 GMT+3–00:00 GMT+3 local time, WeatherVerity score 98/100. Least favorable time outside in Istanbul on 12 Sept 2026: 15:00 GMT+3–17:00 GMT+3 local time. 84/100.

The local day at a glance Europe/Istanbul

Selected period ·

Least favorable ·

Highest score over the full day ·

Now · Calculated at 16:54 GMT+3 local time

Hourly scores; gaps mean missing data. Earlier hours are faded.

Looking for different weather?

Compare selected places for this local day.

Find sunnier places Find warmer places Find colder places Find drier places Wetter weather – higher precipitation risk Find places with less wind Find places with more wind Snow in the forecast

Tomorrow ·

Best time outside · Tomorrow

99/100 · Excellent

  • Temperatures within the activity range · 19.8 °C – 20.7 °C
  • Low precipitation risk · Up to 0% precipitation risk
  • Light wind · Wind up to 1.6 m/s

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Least favorable time outside · Tomorrow

68/100 · GoodStill good outdoors

  • Precipitation forecast · Up to 68% precipitation risk
  • Wind up to 5.5 m/s
  • Temperatures within the activity range · 19.5 °C – 20.5 °C

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

No truly poor periods in this day’s complete forecast.

Full-day details

Selected two-hour window for general outdoor activity in Istanbul on 13 Sept 2026: 06:00 GMT+3–08:00 GMT+3 local time, WeatherVerity score 99/100. Least favorable time outside in Istanbul on 13 Sept 2026: 18:00 GMT+3–20:00 GMT+3 local time. 68/100.

The local day at a glance Europe/Istanbul

Selected period ·

Least favorable ·

Calculated at 16:54 GMT+3 local time

Hourly scores; gaps mean missing data. Earlier hours are faded.

Looking for different weather?

Compare selected places for this local day.

Find sunnier places Find warmer places Find colder places Find drier places Wetter weather – higher precipitation risk Find places with less wind Find places with more wind Snow in the forecast

Day after tomorrow ·

Best time outside · Day after tomorrow

98/100 · Excellent

  • Temperatures within the activity range · 19.3 °C – 19.6 °C
  • Low precipitation risk · Up to 0% precipitation risk
  • Light wind · Wind up to 1.3 m/s

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Least favorable time outside · Day after tomorrow

90/100 · ExcellentStill good outdoors

  • Wind up to 5.1 m/s
  • Temperatures within the activity range · 22.1 °C – 23.2 °C
  • Low precipitation risk · Up to 0% precipitation risk

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

No truly poor periods in this day’s complete forecast.

Full-day details

00:00 is the end of the selected day.

Selected two-hour window for general outdoor activity in Istanbul on 14 Sept 2026: 22:00 GMT+3–00:00 GMT+3 local time, WeatherVerity score 98/100. Least favorable time outside in Istanbul on 14 Sept 2026: 16:00 GMT+3–18:00 GMT+3 local time. 90/100.

The local day at a glance Europe/Istanbul

Selected period ·

Least favorable ·

Calculated at 16:54 GMT+3 local time

Hourly scores; gaps mean missing data. Earlier hours are faded.

Looking for different weather?

Compare selected places for this local day.

Find sunnier places Find warmer places Find colder places Find drier places Wetter weather – higher precipitation risk Find places with less wind Find places with more wind Snow in the forecast

Best and least favorable are relative to this day. Scores describe outdoor comfort, not official warnings.

Find a weather window
Today · 12 Sept 2026

Least wind over 2 hours

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.5–21.7 °C · Average wind: 1.7 m/s; maximum: 1.8 m/s · Precipitation risk: up to 0%

Lowest precipitation risk over 3 hours

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.5–21.2 °C · Average wind: 2.4 m/s; maximum: 2.5 m/s · Precipitation risk: up to 0%

Warmest 2-hour period

Best available period

–

Outdoor Score: 84/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures outside the activity range

Weather values and full answer

Temperature: 26.9–27.3 °C · Average wind: 4.2 m/s; maximum: 4.6 m/s · Precipitation risk: up to 0%

Coolest 2-hour period

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.5–20.1 °C · Average wind: 2 m/s; maximum: 2.1 m/s · Precipitation risk: up to 0%

Best available daylight window

Best available period

–

Outdoor Score: 85/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

In progress

Low precipitation risk · Temperatures outside the activity range

Weather values and full answer

Temperature: 24.9–26.9 °C · Average wind: 4.7 m/s; maximum: 4.9 m/s · Precipitation risk: up to 0%

3 hours with low precipitation risk

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.5–21.2 °C · Average wind: 2.4 m/s; maximum: 2.5 m/s · Precipitation risk: up to 0%

2 hours above 20 °C

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.7–21.2 °C · Average wind: 2.5 m/s; maximum: 2.5 m/s · Precipitation risk: up to 0%

2 hours of clear daylight

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Already passed

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.5–21.7 °C · Average wind: 1.7 m/s; maximum: 1.8 m/s · Precipitation risk: up to 0%

Tomorrow · 13 Sept 2026

Least wind over 2 hours

Best available period

–

Outdoor Score: 99/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.8–20.7 °C · Average wind: 1.4 m/s; maximum: 1.6 m/s · Precipitation risk: up to 0%

Lowest precipitation risk over 3 hours

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.1–20.7 °C · Average wind: 2.2 m/s; maximum: 2.3 m/s · Precipitation risk: up to 0%

Warmest 2-hour period

Best available period

–

Outdoor Score: 85/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 23.1–23.7 °C · Average wind: 5.4 m/s; maximum: 6.4 m/s · Precipitation risk: up to 0%

Coolest 2-hour period

Best available period

–

Outdoor Score: 82/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Precipitation may affect this activity · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.4–19.4 °C · Average wind: 2.7 m/s; maximum: 3 m/s · Precipitation risk: up to 40%

Best available daylight window

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.9–21.9 °C · Average wind: 1.6 m/s; maximum: 2.4 m/s · Precipitation risk: up to 3%

3 hours with low precipitation risk

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.1–20.7 °C · Average wind: 2.2 m/s; maximum: 2.3 m/s · Precipitation risk: up to 0%

2 hours above 20 °C

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 20.2–20.7 °C · Average wind: 2.2 m/s; maximum: 2.3 m/s · Precipitation risk: up to 0%

2 hours of clear daylight

No 2-hour clear daylight period on 13 Sept 2026.

Best available daylight window

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.9–21.9 °C · Average wind: 1.6 m/s; maximum: 2.4 m/s · Precipitation risk: up to 3%

Day after tomorrow · 14 Sept 2026

Least wind over 2 hours

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.3–19.6 °C · Average wind: 1.1 m/s; maximum: 1.3 m/s · Precipitation risk: up to 0%

Lowest precipitation risk over 3 hours

Best available period

–

Outdoor Score: 94/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 19.3–21.9 °C · Average wind: 3.8 m/s; maximum: 4.2 m/s · Precipitation risk: up to 0%

Warmest 2-hour period

Best available period

–

Outdoor Score: 92/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 23.2–23.2 °C · Average wind: 4.3 m/s; maximum: 4.8 m/s · Precipitation risk: up to 0%

Coolest 2-hour period

Best available period

–

Outdoor Score: 95/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 19.1–19.2 °C · Average wind: 3 m/s; maximum: 3.5 m/s · Precipitation risk: up to 8%

Best available daylight window

Best available period

–

Outdoor Score: 90/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 22.1–23.2 °C · Average wind: 4.9 m/s; maximum: 5.1 m/s · Precipitation risk: up to 0%

3 hours with low precipitation risk

Best available period

–

Outdoor Score: 98/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range · Light wind

Weather values and full answer

Temperature: 19.4–20.5 °C · Average wind: 1.6 m/s; maximum: 2.6 m/s · Precipitation risk: up to 0%

2 hours above 20 °C

Best available period

–

Outdoor Score: 94/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 20.3–21.9 °C · Average wind: 4 m/s; maximum: 4.2 m/s · Precipitation risk: up to 0%

2 hours of clear daylight

Best available period

–

Outdoor Score: 91/100

Score and temperatures apply to this period.

Limited data

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Upcoming

Low precipitation risk · Temperatures within the activity range

Weather values and full answer

Temperature: 21.2–22.7 °C · Average wind: 4.6 m/s; maximum: 5.1 m/s · Precipitation risk: up to 0%

How WeatherVerity calculates this

Calculated by WeatherVerity from the forecast data shown on this page.

Underlying forecast data: Open-Meteo · CC BY 4.0

Hourly retrieved: · Fresh until:

Past hours are model estimates, not observations or a record of earlier forecasts.

Cold wind lowers the comfort cap further. Temperature below 15 °C reduces General comfort. A two-hour window including such temperatures is capped at 79. Temperature, precipitation probability/weather code and wind are combined geometrically. A period overview combines 80% time-weighted mean with 20% of the weakest quarter; daylight counts double. Risk intervals remain visible. Raw scores determine rankings; 100 is unavailable with incomplete model inputs. This is a comfort indicator, not forecast accuracy or an official warning.

Limited assessment: gusts, rainfall amount, humidity and solar data are unavailable.

Weather scores are unchanged. Among windows within two points of the highest score and in the same quality band, starts from 06:00 to before 23:00 local time are preferred; 22:00–00:00 qualifies. Then score, daylight and the earliest start break ties. Daylight is optional, including in polar night or midnight sun. The absolute daily best is always retained. Least favorable stays at the actual minimum score; only tied minima use non-overlap and distance. Overlapping windows within a two-point range are grouped; small contrast means a spread of at most five points. A whole-day “no poor periods” statement requires complete coverage, all two-hour windows at least Good (60), and no hourly score in Poor/Very poor (below 40). These are presentation rules, not changes to meteorological scores.

Score labels

  • 90–100: Excellent
  • 75–89: Great
  • 60–74: Good
  • 40–59: Fair
  • 20–39: Poor
  • 0–19: Very poor
Sources & method

Through the day

Today · Sat 12 Sept · Europe/Istanbul

Today's hourly temperature in IstanbulModel forecast from 00:00 to 23:00, Europe/Istanbul. Hourly temperatures range from 19.5 to 27.3 degrees Celsius. Exact values follow below. Gaps indicate missing values.17°24°30°Current hour00:00: 21.2 °C · Clear sky01:00: 20.9 °C · Clear sky02:00: 20.7 °C · Mainly clear03:00: 20.5 °C · Mainly clear04:00: 20.3 °C · Mainly clear05:00: 20.1 °C · Mainly clear06:00: 19.6 °C · Mainly clear07:00: 19.5 °C · Mainly clear08:00: 20.2 °C · Mainly clear09:00: 21.7 °C · Mainly clear10:00: 23.2 °C · Mainly clear11:00: 24.6 °C · Partly cloudy12:00: 25.6 °C · Mainly clear13:00: 26.6 °C · Mainly clear14:00: 27.3 °C · Mainly clear15:00: 27.3 °C · Mainly clear16:00: 26.9 °C · Clear sky17:00: 26.1 °C · Clear sky18:00: 24.9 °C · Clear sky19:00: 23.5 °C · Clear sky20:00: 22.3 °C · Mainly clear21:00: 21.5 °C · Partly cloudy22:00: 21.2 °C · Partly cloudy23:00: 20.9 °C · Partly cloudy00:0006:0012:0017:0023:00
  1. 21 °CClear skyPrecip. chance 0 %Wind 2.5 m/s
  2. 21 °CClear skyPrecip. chance 0 %Wind 2.4 m/s
  3. 21 °CMainly clearPrecip. chance 0 %Wind 2.4 m/s
  4. 21 °CMainly clearPrecip. chance 0 %Wind 2.3 m/s
  5. 20 °CMainly clearPrecip. chance 0 %Wind 2.2 m/s
  6. 20 °CMainly clearPrecip. chance 0 %Wind 2.1 m/s
  7. 20 °CMainly clearPrecip. chance 0 %Wind 2 m/s
  8. 20 °CMainly clearPrecip. chance 0 %Wind 1.8 m/s
  9. 20 °CMainly clearPrecip. chance 0 %Wind 1.7 m/s
  10. 22 °CMainly clearPrecip. chance 0 %Wind 1.8 m/s
  11. 23 °CMainly clearPrecip. chance 0 %Wind 2.5 m/s
  12. 25 °CPartly cloudyPrecip. chance 0 %Wind 2.3 m/s
  13. 26 °CMainly clearPrecip. chance 0 %Wind 1.9 m/s
  14. 27 °CMainly clearPrecip. chance 0 %Wind 2.6 m/s
  15. 27 °CMainly clearPrecip. chance 0 %Wind 3.6 m/s
  16. 27 °CMainly clearPrecip. chance 0 %Wind 4.3 m/s
  17. 27 °CClear skyPrecip. chance 0 %Wind 4.6 m/sCurrent hour
  18. 26 °CClear skyPrecip. chance 0 %Wind 4.7 m/s
  19. 25 °CClear skyPrecip. chance 0 %Wind 4.9 m/s
  20. 24 °CClear skyPrecip. chance 0 %Wind 4.5 m/s
  21. 22 °CMainly clearPrecip. chance 0 %Wind 3.9 m/s
  22. 22 °CPartly cloudyPrecip. chance 0 %Wind 3.1 m/s
  23. 21 °CPartly cloudyPrecip. chance 0 %Wind 2.7 m/s
  24. 21 °CPartly cloudyPrecip. chance 0 %Wind 2.2 m/s

Hourly model forecast, including earlier hours; not measured observations. Source: Open-Meteo. Retrieved . Sources & method.

The next 7 days

Local dates · Europe/Istanbul

Daily forecast for Istanbul, Republic of Türkiye. Source: Open-Meteo. Retrieved .
DayConditionsHigh / LowPrecip. chance*PrecipitationMax wind
Partly cloudy
27 °C / 20 °C0 %0 mm4.9 m/s
Light rain showers
24 °C / 19 °C68 %1.8 mm7.2 m/s
Overcast
23 °C / 19 °C8 %0.1 mm5.1 m/s
Overcast
24 °C / 18 °C0 %0 mm6.4 m/s
Light rain
20 °C / 19 °C18 %3.3 mm4.1 m/s
Overcast
24 °C / 19 °C17 %0 mm4.7 m/s
Partly cloudy
26 °C / 18 °C8 %0 mm5.2 m/s

*Maximum precipitation probability for the day, including rain or snow. How to read these values.

WeatherVerity answer

Weather in Istanbul today

Today

WeatherVerity forecast for Istanbul: high 27 °C, low 20 °C. Partly cloudy.

Maximum precipitation probability: 0 %. Precipitation: 0 mm.

Underlying forecast data: Open-Meteo · Retrieved

Tomorrow

WeatherVerity forecast for Istanbul: high 24 °C, low 19 °C. Light rain showers.

Maximum precipitation probability: 68 %. Precipitation: 1.8 mm.

Underlying forecast data: Open-Meteo · Retrieved

Model forecasts, not measured observations. · Europe/Istanbul

Verity Trust

Traceable forecast details, without claiming observed accuracy.

Forecast by
Open-Meteo
Published by
WeatherVerity
Last retrieved
Valid for
2026-09-11T21:00:00.000Z – 2026-09-14T21:00:00.000Z
Local time zone
Europe/Istanbul
Data status
current: Fresh · hourly: Fresh · forecast: Fresh
Method
forecast-receipt-method-v2 · Full method
Forecast agreement
Not available
Forecast stability
Collecting data
Verified accuracy
Collecting data
What changed?

Collecting data

Only the same provider, product, place, unit, interval and exact valid time are compared.

Behind this forecast

Weather sources
Open-Meteo
Location source
GeoNames 745044 via Open-Meteo
Local time zone
Europe/Istanbul
Current retrieved
Forecast retrieved
Hourly retrieved
Page data last updated
Model run issued
Not supplied by this API

Current conditions are model estimates. Retrieval time tells you when we fetched the data, not when the weather model was run. Sources, units and method.