Common information
CountryIceland
Population6 510
Weather, climate, temperature by months in Selfoss
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 15 | 12 | 10 | 8 | 7 | 8 | 8 | 11 | 18 | 18 | 22 | 21 | 22 |
| Average high, °C | 10 | 6 | 3 | 1 | 1 | 2 | 2 | 4 | 8 | 11 | 13 | 12 | 6 |
| Average temperature, °C | 7 | 4 | 1 | 0 | 0 | 0 | 0 | 2 | 7 | 10 | 11 | 11 | 4 |
| Average low, °C | 5 | 2 | 0 | -2 | -2 | -1 | -1 | 0 | 5 | 7 | 10 | 8 | 3 |
| Record low, °C | -3 | -8 | -12 | -16 | -16 | -15 | -16 | -12 | -3 | 2 | 3 | 2 | -16 |
| Rain, days | 22 | 21 | 19 | 17 | 14 | 15 | 15 | 17 | 20 | 23 | 22 | 24 | 229 |
| Snow, days | 0 | 5 | 10 | 17 | 15 | 15 | 18 | 11 | 2 | 0 | 0 | 0 | 93 |
| Fog, days | 8 | 7 | 7 | 4 | 6 | 7 | 5 | 4 | 8 | 10 | 10 | 7 | 83 |
| Thunderstorms, days | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Average precipitation, mm. | 100 | 120 | 90 | 90 | 80 | 70 | 80 | 70 | 50 | 60 | 80 | 90 | 980 |
| Relative humidity, % | 85 | 80 | 80 | 80 | 80 | 80 | 80 | 75 | 80 | 80 | 85 | 85 | 81 |
| Relative humidity morning, % | 83 | 81 | 80 | 78 | 78 | 79 | 79 | 81 | 83 | 85 | 86 | 88 | 82 |
| Relative humidity evening, % | 75 | 76 | 80 | 79 | 79 | 78 | 75 | 69 | 74 | 78 | 79 | 78 | 77 |
| Wind speed, km/h | 16 | 17 | 17 | 19 | 20 | 19 | 19 | 20 | 16 | 16 | 16 | 16 | 18 |
| Day Length, часов | 14 | 11 | 8 | 6 | 7 | 10 | 13 | 16 | 20 | 22 | 21 | 17 | 14 |
| Dew point, °C | 4 | 1 | -1 | -3 | -3 | -2 | -3 | -1 | 2 | 6 | 8 | 7 | 15 |
| Growing degree-day, °C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 52 | 26 | 78 |
| Solar radiation, global, Mj/m2 | 8 | 3 | 1 | 0 | 0 | 2 | 5 | 10 | 16 | 17 | 15 | 12 | 8 |