Istanbul, Turkey Weather
Istanbul hourly forecast: next 24 hours
Today's high of 84°F (29°C) is right in line with the typical August high of 84°F (29°C).
Current conditions in detail
Istanbul weather tomorrow (Thursday, August 27)
Tomorrow in Istanbul looks sunny, with a high of 84° and an overnight low of 72°. Rain is unlikely (4% chance). Winds top out near 14 mph, and the UV index reaches 7 (high).
Istanbul 14-day forecast
About the weather in Istanbul
Istanbul runs on a dry-summer rhythm: the warmest months are also the driest. August averages 20 mm (0.8 in) while the wet season peaks in January at 4.3 inches (109 mm). Highs range from 48°F (9°C) to 84°F (29°C).
Istanbul weather: quick facts
- Hottest month: August - highs near 84°F (29°C)
- Coldest month: January - highs near 48°F (9°C)
- Decade extremes (2015-2024): 102°F (39°C) high · 20°F (-7°C) low
- Wettest month: January (13 rainy days) · Sunniest: July (13.5 h sun/day)
- Climate type: Mediterranean
- Annual swing: 19°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 6 days a year
- Average humidity: 76%
Temperatures through the year
January sits at the other end of the year: 48°F (9°C) by day, 39°F (4°C) at night. Warmth peaks in August: highs of 84°F (29°C), lows of 71°F (22°C). The gridded 2015-2024 daily record for this location tops out at 102°F (39°C) and bottoms at 20°F (-7°C) - decade extremes, not all-time station records. Days and nights are about 7°C apart on average - narrower than about 82% of the cities we track.
Rain, sun and snow
July is the brightest month at 13.5 hours of sun a day, against an annual average of 9.4. Snow falls on roughly 6 days a year, mostly December through March.
Season by season
Spring (March through May)
Through spring, Istanbul stays on the cool side of mild: 62°F (17°C) by day, 48°F (9°C) after dark, and expect showers on roughly 29 days across the season.
Summer (June through August)
Summer in Istanbul brings hot afternoons, with daytime highs averaging 82°F (28°C) and nights around 68°F (20°C); rain comes on about 17 days over the three months. Daylight is generous - around 13.0 hours of sun a day.
Fall (September through November)
Through fall, Istanbul brings comfortable warmth: 69°F (21°C) by day, 57°F (14°C) after dark, and expect showers on roughly 24 days across the season.
Winter (December through February)
Winter in Istanbul is chilly, with daytime highs averaging 51°F (10°C) and nights around 41°F (5°C); rain falls on around 37 of the 90 days, plus about 5 snowy days.
Average temperatures in Istanbul by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 48° | 39° | 13 | 4.3 in | 5.5 h/day | 79% |
| February | 51° | 40° | 11 | 3.0 in | 6.8 h/day | 79% |
| March | 54° | 42° | 11 | 3.0 in | 7.8 h/day | 79% |
| April | 62° | 47° | 9 | 2.2 in | 10.2 h/day | 75% |
| May | 70° | 56° | 8 | 2.2 in | 11.7 h/day | 76% |
| June | 79° | 65° | 8 | 2.0 in | 12.9 h/day | 76% |
| July | 84° | 69° | 5 | 1.2 in | 13.5 h/day | 71% |
| August | 84° | 71° | 3 | 0.8 in | 12.6 h/day | 72% |
| September | 78° | 65° | 8 | 1.9 in | 10.9 h/day | 72% |
| October | 68° | 57° | 7 | 2.2 in | 8.4 h/day | 78% |
| November | 61° | 50° | 9 | 3.3 in | 7.1 h/day | 78% |
| December | 53° | 44° | 12 | 3.5 in | 5.5 h/day | 80% |