Istanbul
Turkey
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 38 | 36 | 27 | 22 | 20 | 22 | 30 | 32 | 37 | 41 | 43 | 42 | 43 |
| Average high, °C | 29 | 22 | 16 | 11 | 10 | 11 | 15 | 20 | 25 | 30 | 33 | 32 | 21 |
| Average temperature, °C | 22 | 17 | 11 | 7 | 6 | 7 | 10 | 14 | 19 | 23 | 26 | 26 | 16 |
| Average low, °C | 16 | 11 | 6 | 3 | 1 | 2 | 4 | 8 | 12 | 16 | 19 | 19 | 10 |
| Record low, °C | 6 | -2 | -7 | -10 | -7 | -8 | -7 | 0 | 1 | 7 | 11 | 12 | -10 |
| Rain, days | 15 | 14 | 14 | 14 | 16 | 14 | 14 | 16 | 19 | 13 | 13 | 14 | 176 |
| Snow, days | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 4 |
| Fog, days | 9 | 13 | 15 | 18 | 16 | 13 | 15 | 11 | 7 | 5 | 7 | 6 | 135 |
| Thunderstorms, days | 8 | 4 | 3 | 1 | 1 | 1 | 2 | 4 | 10 | 14 | 11 | 11 | 70 |
| Average precipitation, mm. | 17 | 37 | 54 | 88 | 77 | 66 | 62 | 42 | 30 | 21 | 12 | 7 | 513 |
| Relative humidity morning, % | 78 | 83 | 87 | 87 | 86 | 84 | 84 | 84 | 83 | 78 | 73 | 75 | 82 |
| Relative humidity evening, % | 39 | 52 | 65 | 72 | 68 | 63 | 56 | 50 | 45 | 38 | 37 | 37 | 52 |
| Wind speed, km/h | 16 | 14 | 14 | 8 | 14 | 14 | 16 | 14 | 14 | 16 | 17 | 17 | 15 |
| Day Length, часов | 13 | 12 | 11 | 10 | 10 | 11 | 12 | 14 | 15 | 15 | 15 | 14 | 13 |
| Dew point, °C | 12 | 10 | 6 | 3 | 2 | 2 | 3 | 7 | 11 | 13 | 15 | 15 | 99 |
| Growing degree-day, °C | 383 | 215 | 33 | 0 | 0 | 0 | 0 | 133 | 276 | 400 | 508 | 499 | 2448 |
| Solar radiation, global, Mj/m2 | 18 | 12 | 7 | 5 | 7 | 9 | 13 | 17 | 22 | 25 | 26 | 23 | 15 |