Average annual temperature is 5.9 °C
Absolute maximum temperature: 29.1 °C
Absolute minimum temperature: -21.8 °C
Number of sunny days: 154 days
Number of rainy days: 170 days
Number of snow days: 41 days
Look at detailed online map of Fastnässätern
* Weather data for Fastnässätern Sweden is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 4.9 | 7.5 | 8.8 | 18.2 | 22.1 | 29.1 | 25.8 | 21.9 | 23.8 | 16.1 | 4.8 | 5.3 |
| Average daytime temperature (°C) | 0.4 | 2.1 | 2.4 | 9.8 | 16.8 | 23.4 | 19.6 | 18.9 | 17.6 | 7.4 | 0.4 | -3.9 |
| Average temperature (°C) | -1.5 | -1.2 | -2.5 | 4.5 | 11.3 | 18.3 | 15.6 | 15.2 | 13.8 | 4.6 | -1.7 | -6.2 |
| Average night temperature (°C) | -3.8 | -4.8 | -8.0 | -0.7 | 4.8 | 11.8 | 11.5 | 11.9 | 10.2 | 2.0 | -4.0 | -9.4 |
| Absolute minimum temperature (°C) | -13.8 | -12.2 | -21.8 | -9.8 | -2.0 | 4.7 | 8.9 | 9.1 | 5.3 | -2.8 | -11.0 | -18.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 7.0 | 10.0 | 13.0 | 15.0 | 18.0 | 18.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 |
| Daylight mean duration (h) | 6.8 | 9.1 | 11.8 | 14.6 | 17.2 | 18.8 | 18.0 | 15.6 | 12.9 | 10.1 | 7.5 | 6.0 |
| Daylight minimum duration (h) | 5.0 | 7.0 | 10.0 | 13.0 | 16.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 | 5.0 |
| Sunshine mean duration (h) | 1.5 | 4.7 | 6.5 | 8.3 | 13.9 | 14.6 | 11.8 | 7.7 | 6.3 | 4.4 | 1.7 | 1.1 |
| Precipitation (mm) | 80 | 44 | 58 | 91 | 34 | 36 | 188 | 169 | 59 | 48 | 68 | 41 |
| Sunny days | 11 | 18 | 14 | 16 | 21 | 21 | 2 | 3 | 11 | 14 | 11 | 12 |
| Rainy days | 10 | 5 | 11 | 13 | 10 | 9 | 29 | 28 | 19 | 14 | 13 | 9 |
| Snow days | 10 | 5 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 10 |
The best time to visit Fastnässätern during the most sunny months:
Months with the longest average daylight duration in Fastnässätern:
The largest precipitation sum in Fastnässätern is at