Common information
CountryFinland
Population13 607
Weather, climate, temperature by months in Naantali
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 23 | 17 | 10 | 8 | 7 | 11 | 12 | 21 | 27 | 32 | 30 | 31 | 32 |
| Average high, °C | 13 | 8 | 2 | -1 | -3 | -2 | 1 | 7 | 15 | 19 | 20 | 19 | 8 |
| Average temperature, °C | 10 | 5 | 0 | -3 | -5 | -5 | -1 | 3 | 10 | 14 | 16 | 15 | 5 |
| Average low, °C | 6 | 2 | -1 | -6 | -8 | -8 | -5 | -1 | 4 | 9 | 12 | 10 | 1 |
| Record low, °C | -6 | -10 | -21 | -33 | -35 | -32 | -23 | -15 | -5 | -1 | 3 | 1 | -35 |
| Rain, days | 6 | 6 | 5 | 5 | 4 | 3 | 3 | 4 | 5 | 4 | 6 | 7 | 58 |
| Snow, days | 3 | 4 | 1 | 1 | 4 | 4 | 7 | 6 | 6 | 5 | 3 | 2 | 46 |
| Fog, days | 19 | 19 | 17 | 16 | 19 | 18 | 21 | 16 | 17 | 15 | 20 | 21 | 218 |
| Thunderstorms, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 4 | 3 | 12 |
| Average precipitation, mm. | 60 | 60 | 60 | 50 | 40 | 30 | 20 | 30 | 30 | 40 | 70 | 80 | 570 |
| Relative humidity, % | 85 | 85 | 90 | 90 | 90 | 90 | 90 | 90 | 85 | 85 | 85 | 85 | 88 |
| Relative humidity morning, % | 93 | 91 | 91 | 90 | 89 | 90 | 90 | 88 | 84 | 84 | 90 | 92 | 89 |
| Relative humidity evening, % | 71 | 79 | 88 | 89 | 88 | 83 | 72 | 58 | 51 | 52 | 58 | 62 | 71 |
| Wind speed, km/h | 9 | 12 | 14 | 12 | 14 | 12 | 12 | 12 | 12 | 9 | 9 | 9 | 11 |
| Day Length, часов | 14 | 11 | 8 | 7 | 8 | 10 | 13 | 16 | 19 | 21 | 19 | 17 | 13 |
| Dew point, °C | 7 | 3 | 0 | -5 | -7 | -7 | -5 | -1 | 2 | 7 | 11 | 10 | 15 |
| Growing degree-day, °C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 133 | 198 | 155 | 486 |
| Solar radiation, global, Mj/m2 | 9 | 4 | 2 | 1 | 1 | 4 | 9 | 14 | 20 | 20 | 19 | 15 | 10 |