Tallinn
Estonia
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 28 | 22 | 12 | 9 | 9 | 10 | 16 | 27 | 29 | 31 | 34 | 34 | 34 |
| Average high, °C | 15 | 9 | 3 | 0 | -1 | -2 | 2 | 8 | 15 | 19 | 21 | 20 | 9 |
| Average temperature, °C | 11 | 6 | 0 | -2 | -5 | -5 | -3 | 1 | 7 | 13 | 16 | 15 | 5 |
| Average low, °C | 7 | 3 | -1 | -5 | -7 | -8 | -4 | 0 | 5 | 10 | 12 | 12 | 2 |
| Record low, °C | -5 | -11 | -19 | -32 | -31 | -30 | -26 | -12 | -5 | 0 | 4 | 2 | -32 |
| Fog, days | 11 | 13 | 13 | 12 | 11 | 13 | 16 | 14 | 12 | 11 | 13 | 14 | 153 |
| Thunderstorms, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 3 | 3 | 12 |
| Average precipitation, mm. | 74 | 75 | 68 | 58 | 48 | 32 | 32 | 39 | 37 | 55 | 75 | 81 | 674 |
| Relative humidity, % | 83 | 84 | 87 | 88 | 87 | 85 | 81 | 75 | 69 | 73 | 77 | 80 | 81 |
| Relative humidity morning, % | 92 | 89 | 89 | 88 | 87 | 87 | 88 | 86 | 84 | 87 | 91 | 92 | 88 |
| Relative humidity evening, % | 72 | 76 | 85 | 86 | 85 | 80 | 73 | 64 | 55 | 59 | 63 | 67 | 72 |
| Wind speed, km/h | 13 | 14 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 14 |
| Monthly sunshine, часов | 148 | 89 | 30 | 18 | 24 | 55 | 122 | 185 | 287 | 292 | 294 | 240 | 1783 |
| Day Length, часов | 14 | 11 | 8 | 7 | 8 | 10 | 13 | 15 | 18 | 20 | 19 | 16 | 13 |
| Dew point, °C | 7 | 3 | 0 | -4 | -6 | -7 | -4 | 0 | 3 | 8 | 11 | 11 | 22 |
| Growing degree-day, °C | 155 | 17 | 0 | 0 | 41 | 0 | 0 | 0 | 0 | 0 | 83 | 172 | 468 |
| Atmosphere pressure, bar | 1008 | 1009 | 1007 | 1005 | 1007 | 1010 | 1010 | 1009 | 1012 | 1008 | 1007 | 1009 | 12100 |
| Solar radiation, global, Mj/m2 | 10 | 5 | 2 | 1 | 1 | 4 | 9 | 15 | 20 | 21 | 20 | 16 | 10 |