Istanbul Climate by Month
Istanbul, Turkey
Warm summers and cool winters, with rain spread through the year.
Istanbul has warm summers and cool winters, with rain spread through the year. July is the warmest month, with highs around 85°F (30°C); January is the coolest at 49°F (9°C), and nights dip to 38°F (3°C). It gets 27 in (676 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(30°C)
- Average high, July
- Coldest nights
- 38°F(3°C)
- Average low, February
- Rain per year
- 27 in(676 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in Istanbul
Best for weatherThe most comfortable weather comes in May, June and September, with highs around 77°F (25°C) and about 1.5 in (38 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 49°F (9°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Istanbul weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 49°F(9°C) | 38°F(4°C) | 3.7 in(93 mm) | 73% | 1.7 |
| FebFebruary | 50°F(10°C) | 38°F(3°C) | 2.5 in(63 mm) | 71% | 2.5 |
| MarMarch | 54°F(12°C) | 40°F(5°C) | 2.7 in(68 mm) | 72% | 3.6 |
| AprApril | 63°F(17°C) | 46°F(8°C) | 1.7 in(42 mm) | 69% | 4.9 |
| MayMayBest | 72°F(22°C) | 55°F(13°C) | 1.3 in(34 mm) | 70% | 6.1 |
| JunJuneBest | 81°F(27°C) | 63°F(17°C) | 1.1 in(28 mm) | 64% | 7.1 |
| JulJuly | 85°F(30°C) | 68°F(20°C) | 0.9 in(22 mm) | 64% | 7.5 |
| AugAugust | 85°F(30°C) | 69°F(20°C) | 0.8 in(21 mm) | 63% | 6.9 |
| SepSeptemberBest | 78°F(26°C) | 62°F(16°C) | 2.0 in(52 mm) | 64% | 4.9 |
| OctOctober | 69°F(21°C) | 55°F(13°C) | 3.0 in(76 mm) | 74% | 3.4 |
| NovNovember | 60°F(16°C) | 48°F(9°C) | 2.9 in(73 mm) | 71% | 2.2 |
| DecDecember | 52°F(11°C) | 42°F(5°C) | 4.1 in(104 mm) | 73% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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