Average annual temperature is 4.4 °C
Absolute maximum temperature: 20.6 °C
Absolute minimum temperature: -19.3 °C
Number of sunny days: 117
Number of rainy days: 226
Number of snow days: 22
Average annual precipitation: 1864 mm
Look at detailed online map of Selfoss
* Weather data for Selfoss Iceland is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 8 | 9.1 | 9.4 | 12.2 | 14.7 | 17.5 | 20.4 | 20.6 | 13.8 | 11.2 | 8.8 | 7.6 |
| Average daytime temperature (°C) | -0.6 | 4.2 | 1.1 | 7.7 | 9.6 | 13.3 | 16.5 | 16 | 11 | 6.5 | 3.5 | -0.9 |
| Average temperature (°C) | -3.8 | 1.6 | -2.4 | 4.4 | 6.8 | 10.4 | 12.4 | 12.2 | 8 | 4.2 | 1.8 | -2.9 |
| Average night temperature (°C) | -7.2 | -1.3 | -5.4 | 1 | 3.9 | 7.4 | 8.3 | 8.6 | 5.3 | 1.2 | -0.2 | -4.9 |
| Absolute minimum temperature (°C) | -19.3 | -13.8 | -12.5 | -7 | -9.7 | 3.1 | 4.9 | 4.4 | -0.8 | -3.6 | -5.2 | -12.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 7 | 10.1 | 13.4 | 16.7 | 19.9 | 21 | 20.7 | 17.9 | 14.6 | 11.4 | 8.1 | 5.1 |
| Daylight mean duration (h) | 5.6 | 8.6 | 11.8 | 15.1 | 18.4 | 20.7 | 19.5 | 16.3 | 13 | 9.8 | 6.6 | 4.5 |
| Daylight minimum duration (h) | 4.5 | 7.2 | 10.2 | 13.5 | 16.8 | 20 | 18 | 14.7 | 11.5 | 8.2 | 5.2 | 4.2 |
| Sunshine mean duration (h) | 2 | 3.5 | 7.3 | 7.9 | 6.5 | 8.2 | 12.3 | 9.7 | 7.4 | 4.6 | 2.9 | 1.6 |
| Precipitation (mm) | 142 | 239 | 59 | 240 | 291 | 179 | 16 | 113 | 202 | 176 | 82 | 125 |
| Sunny days | 12 | 3 | 21 | 5 | 1 | 5 | 17 | 8 | 8 | 11 | 12 | 14 |
| Rainy days | 14 | 22 | 7 | 24 | 29 | 25 | 14 | 23 | 22 | 19 | 16 | 11 |
| Snow days | 5 | 3 | 3 | 1 | 1 | 1 | 2 | 6 |
The best time to visit Selfoss during the most sunny months:
Months with the longest average daylight duration in Selfoss:
The largest precipitation sum in Selfoss is at