Türkiye · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Istanbul are May, June and September, when daytime temperatures are agreeable and rainfall is relatively low.
Istanbul sees its warmest weather in August, when daytime highs average around 30°C, and its coolest in January (around 9°C).
Annual precipitation totals roughly 641mm — December is typically the wettest month (~88mm) and July the driest (~19mm).
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 9° / 4°C | 74mm | 🤔 Fair |
| February | 10° / 4°C | 77mm | 🤔 Fair |
| March | 12° / 5°C | 61mm | 🤔 Fair |
| April | 17° / 9°C | 47mm | 👍 Good |
| May | 22° / 13°C | 33mm | 🌟 Great |
| June | 27° / 18°C | 31mm | 🌟 Great |
| July | 30° / 21°C | 19mm | 🌟 Great |
| August | 30° / 21°C | 23mm | 👍 Good |
| September | 26° / 17°C | 43mm | 🌟 Great |
| October | 21° / 14°C | 75mm | 🌟 Great |
| November | 16° / 9°C | 70mm | 👍 Good |
| December | 11° / 6°C | 88mm | 🤔 Fair |
January in Istanbul is chilly, with average daytime highs around 9°C (49°F) and nighttime lows near 4°C (39°F). Expect roughly 74mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
February in Istanbul is chilly, with average daytime highs around 10°C (50°F) and nighttime lows near 4°C (39°F). Expect roughly 77mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
March in Istanbul is chilly, with average daytime highs around 12°C (54°F) and nighttime lows near 5°C (42°F). Expect roughly 61mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
April in Istanbul is mild, with average daytime highs around 17°C (63°F) and nighttime lows near 9°C (47°F). Expect roughly 47mm of precipitation spread over about 7 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
May in Istanbul is pleasantly warm, with average daytime highs around 22°C (72°F) and nighttime lows near 13°C (56°F). Expect roughly 33mm of precipitation spread over about 4 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
June in Istanbul is warm, with average daytime highs around 27°C (80°F) and nighttime lows near 18°C (64°F). Expect roughly 31mm of precipitation spread over about 4 rainy days, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
July in Istanbul is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 21°C (69°F). Expect roughly 19mm of precipitation spread over about 2 rainy days, and rain is rare.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
August in Istanbul is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 21°C (70°F). Expect roughly 23mm of precipitation spread over about 3 rainy days, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
September in Istanbul is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 17°C (63°F). Expect roughly 43mm of precipitation spread over about 5 rainy days, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
October in Istanbul is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 14°C (56°F). Expect roughly 75mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
November in Istanbul is mild, with average daytime highs around 16°C (60°F) and nighttime lows near 9°C (49°F). Expect roughly 70mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
December in Istanbul is chilly, with average daytime highs around 11°C (52°F) and nighttime lows near 6°C (42°F). Expect roughly 88mm of precipitation spread over about 11 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers