Tallinn
Estonia
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 30 | 21 | 12 | 8 | 7 | 10 | 15 | 27 | 30 | 31 | 32 | 35 | 35 |
| Average high, °C | 15 | 9 | 2 | -1 | -3 | -3 | 2 | 9 | 16 | 20 | 22 | 21 | 9 |
| Average temperature, °C | 10 | 5 | 0 | -4 | -5 | -6 | -2 | 4 | 11 | 15 | 17 | 15 | 5 |
| Average low, °C | 6 | 2 | -2 | -7 | -9 | -10 | -6 | 0 | 5 | 9 | 11 | 10 | 1 |
| Record low, °C | -8 | -14 | -22 | -40 | -35 | -38 | -30 | -13 | -7 | -2 | 1 | 0 | -40 |
| Rain, days | 16 | 15 | 14 | 8 | 7 | 4 | 7 | 9 | 10 | 13 | 12 | 14 | 129 |
| Snow, days | 0 | 2 | 10 | 18 | 17 | 15 | 11 | 5 | 1 | 0 | 0 | 0 | 79 |
| Fog, days | 12 | 14 | 15 | 14 | 14 | 14 | 15 | 10 | 8 | 10 | 13 | 15 | 154 |
| Thunderstorms, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 3 | 3 | 12 |
| Average precipitation, mm. | 64 | 66 | 56 | 51 | 44 | 33 | 34 | 34 | 48 | 66 | 84 | 84 | 664 |
| Relative humidity, % | 85 | 87 | 90 | 90 | 87 | 85 | 81 | 75 | 67 | 73 | 77 | 81 | 82 |
| Relative humidity morning, % | 93 | 91 | 90 | 89 | 87 | 87 | 88 | 87 | 86 | 90 | 93 | 94 | 90 |
| Relative humidity evening, % | 71 | 76 | 86 | 86 | 83 | 79 | 69 | 57 | 52 | 58 | 61 | 64 | 70 |
| Wind speed, km/h | 10 | 11 | 12 | 12 | 13 | 12 | 12 | 12 | 11 | 10 | 9 | 9 | 11 |
| Monthly sunshine, часов | 140 | 82 | 30 | 18 | 31 | 61 | 124 | 177 | 268 | 277 | 276 | 228 | 1711 |
| Day Length, часов | 14 | 11 | 9 | 7 | 8 | 10 | 13 | 15 | 18 | 20 | 19 | 16 | 13 |
| Dew point, °C | 7 | 3 | -1 | -5 | -7 | -8 | -5 | 0 | 4 | 9 | 12 | 11 | 20 |
| Growing degree-day, °C | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 137 | 195 | 167 | 523 |
| Atmosphere pressure, bar | 1005 | 1006 | 1004 | 1002 | 1004 | 1006 | 1006 | 1005 | 1008 | 1005 | 1004 | 1005 | 12061 |
| Solar radiation, global, Mj/m2 | 10 | 5 | 2 | 1 | 1 | 4 | 8 | 14 | 20 | 21 | 20 | 16 | 10 |