Common information
CountryFinland
Population54 616
Weather, climate, temperature by months in Kotka
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 23 | 16 | 10 | 7 | 3 | 6 | 7 | 16 | 25 | 27 | 28 | 27 | 28 |
| Average high, °C | 13 | 8 | 2 | -1 | -3 | -4 | -1 | 5 | 12 | 17 | 20 | 18 | 7 |
| Average temperature, °C | 10 | 6 | 1 | -2 | -5 | -6 | -5 | 1 | 8 | 13 | 16 | 15 | 4 |
| Average low, °C | 8 | 4 | 0 | -4 | -7 | -9 | -9 | -2 | 5 | 10 | 13 | 12 | 2 |
| Record low, °C | 0 | -6 | -15 | -23 | -32 | -32 | -25 | 0 | -3 | 1 | 7 | 6 | -32 |
| Rain, days | 5 | 7 | 6 | 4 | 5 | 4 | 3 | 3 | 3 | 4 | 6 | 6 | 56 |
| Snow, days | 7 | 9 | 6 | 6 | 5 | 7 | 8 | 4 | 2 | 2 | 5 | 6 | 67 |
| Fog, days | 7 | 9 | 6 | 6 | 5 | 7 | 8 | 4 | 2 | 2 | 5 | 6 | 67 |
| Thunderstorms, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 5 | 3 | 14 |
| Average precipitation, mm. | 50 | 50 | 50 | 30 | 40 | 30 | 20 | 30 | 20 | 30 | 60 | 60 | 470 |
| Relative humidity, % | 87 | 90 | 90 | 91 | 90 | 88 | 84 | 84 | 79 | 79 | 83 | 84 | 86 |
| Relative humidity morning, % | 92 | 90 | 90 | 88 | 86 | 87 | 88 | 86 | 81 | 82 | 87 | 91 | 87 |
| Relative humidity evening, % | 71 | 78 | 87 | 87 | 85 | 81 | 75 | 65 | 54 | 60 | 62 | 67 | 73 |
| Wind speed, km/h | 12 | 13 | 14 | 14 | 13 | 12 | 12 | 11 | 12 | 12 | 11 | 11 | 12 |
| Monthly sunshine, часов | 139 | 85 | 25 | 9 | 19 | 65 | 121 | 191 | 303 | 304 | 309 | 227 | 1795 |
| Day Length, часов | 14 | 11 | 8 | 7 | 8 | 10 | 13 | 16 | 19 | 21 | 19 | 16 | 13 |
| Dew point, °C | 8 | 5 | 0 | -4 | -7 | -8 | -7 | 0 | 5 | 10 | 13 | 12 | 27 |
| Growing degree-day, °C | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 117 | 224 | 181 | 563 |
| Atmosphere pressure, bar | 1011 | 1013 | 1012 | 985 | 1012 | 1015 | 1014 | 1014 | 1016 | 1012 | 1011 | 1012 | 12125 |
| Solar radiation, global, Mj/m2 | 10 | 5 | 2 | 1 | 1 | 4 | 9 | 15 | 20 | 21 | 20 | 16 | 10 |