Istanbul, Turkey: Annual Weather Averages
July is the hottest month in Istanbul with an average temperature of 23.5°C (74°F) and the coldest is February at 5.5°C (42°F) with the most daily sunshine hours at 12 in July. The wettest month is January with an average of 100mm of rain. The best month to swim in the sea is in August when the average sea temperature is 22°C (72°F).
Average Temperature: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 6 | 6 | 8 | 12 | 16 | 22 | 24 | 24 | 21 | 16 | 12 | 8 |
| °F | 43 | 42 | 46 | 54 | 61 | 71 | 74 | 74 | 69 | 60 | 53 | 46 |
Average High/Low Temperature: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 8 | 8 | 11 | 16 | 20 | 26 | 28 | 28 | 25 | 19 | 14 | 10 |
| Low °C | 4 | 3 | 5 | 8 | 12 | 17 | 19 | 19 | 16 | 12 | 9 | 6 |
| High °F | 46 | 46 | 52 | 61 | 68 | 79 | 82 | 82 | 77 | 66 | 57 | 50 |
| Low °F | 39 | 37 | 41 | 46 | 54 | 63 | 66 | 66 | 61 | 54 | 48 | 43 |
Average Day/Night Temperature: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 7 | 9 | 11 | 14 | 19 | 24 | 26 | 27 | 23 | 18 | 14 | 9 |
| Night °C | 7 | 8 | 10 | 13 | 18 | 23 | 25 | 26 | 23 | 17 | 14 | 8 |
| Day °F | 45 | 48 | 51 | 56 | 66 | 75 | 79 | 81 | 74 | 65 | 58 | 48 |
| Night °F | 44 | 46 | 50 | 56 | 65 | 73 | 78 | 79 | 73 | 63 | 56 | 47 |
Average Rainfall: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 100 | 70 | 50 | 60 | 40 | 30 | 30 | 20 | 50 | 60 | 100 | 100 |
| Days | 14 | 12 | 13 | 11 | 9 | 6 | 3 | 4 | 8 | 10 | 13 | 17 |
Average Daily Sunshine Hours: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 3 | 4 | 5 | 6 | 9 | 11 | 12 | 11 | 8 | 6 | 4 | 3 |
Average Sea Temperature: Istanbul
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 13 | 13 | 13 | 13 | 16 | 19 | 21 | 22 | 21 | 18 | 16 | 14 |
| °F | 55 | 55 | 55 | 55 | 61 | 66 | 70 | 72 | 70 | 64 | 61 | 57 |
