Europe › Turkey › Istanbul
30-year normals (1991-2020)
Istanbul has a Mediterranean climate, classified as Csa in the Köppen system. The warmest month is July with an average high of 28°C, while the coldest month is January with lows dropping to 4°C. The annual temperature range of 24°C reflects moderate seasonal variation.
The driest month is August with only 3 rain days and 21mm of precipitation. For travellers, August through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 65% to 65% throughout the year.
Based on temperature and rainfall data, the best months to visit Istanbul are July, August, April. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
Full Best Time to Visit GuideWarmest Month
28°C
July
Coldest Month
4°C
January
Driest Month
3 days
August
Annual Range
24°C
4° to 28°
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 8°C | 4°C | 13 | 6h | View |
| February | 9°C | 4°C | 12 | 7h | View |
| March | 11°C | 5°C | 11 | 9h | View |
| April | 15°C | 8°C | 8 | 10h | View |
| May | 20°C | 13°C | 6 | 12h | View |
| June | 25°C | 18°C | 6 | 13h | View |
| July | 28°C | 21°C | 4 | 14h | View |
| August | 28°C | 21°C | 3 | 13h | View |
| September | 24°C | 18°C | 7 | 11h | View |
| October | 19°C | 14°C | 9 | 8h | View |
| November | 14°C | 9°C | 10 | 7h | View |
| December | 10°C | 6°C | 13 | 5h | View |
January
13 rain days, 6h sun
February
12 rain days, 7h sun
March
11 rain days, 9h sun
April
8 rain days, 10h sun
May
6 rain days, 12h sun
June
6 rain days, 13h sun
July
4 rain days, 14h sun
August
3 rain days, 13h sun
September
7 rain days, 11h sun
October
9 rain days, 8h sun
November
10 rain days, 7h sun
December
13 rain days, 5h sun
Istanbul in July
Data Sources for Istanbul
Climate normals represent 30-year averages (1991-2020). Individual years may vary.