Average annual temperature is 7.2 °C
Absolute maximum temperature: 24.5 °C
Absolute minimum temperature: -11.3 °C
Number of sunny days: 131
Number of rainy days: 190
Number of snow days: 44
Average annual precipitation: 730 mm
Look at detailed online map of Mariehamn
* Weather data for Mariehamn Åland is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 5.1 | 5.9 | 6.8 | 12.5 | 18.1 | 24.5 | 20.8 | 23.4 | 21.1 | 14.3 | 9.2 | 6.8 |
| Average daytime temperature (°C) | 2.3 | 1.5 | 1.5 | 6.7 | 11.5 | 19.2 | 18.6 | 18.2 | 16.9 | 8.5 | 3.6 | 0.5 |
| Average temperature (°C) | 1 | 0.1 | -0.7 | 3.8 | 8.9 | 15.7 | 16.8 | 16.7 | 15.3 | 7.1 | 2.3 | -1 |
| Average night temperature (°C) | -0.4 | -1.6 | -3.8 | 1 | 5.9 | 11.6 | 14.8 | 15.2 | 13.3 | 5.5 | 0.9 | -2.6 |
| Absolute minimum temperature (°C) | -5.3 | -4.9 | -11.3 | -3.6 | -0.5 | 5.9 | 12 | 12.9 | 8 | 0.4 | -7.5 | -6.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 7.9 | 10.4 | 13.2 | 15.9 | 18.3 | 18.9 | 18.8 | 16.9 | 14.2 | 11.5 | 8.7 | 6.5 |
| Daylight mean duration (h) | 6.8 | 9.2 | 11.8 | 14.6 | 17.2 | 18.7 | 18 | 15.6 | 12.9 | 10.1 | 7.6 | 6 |
| Daylight minimum duration (h) | 6 | 8 | 10.5 | 13.3 | 16 | 18.3 | 17 | 14.3 | 11.6 | 8.8 | 6.5 | 5.9 |
| Sunshine mean duration (h) | 3.6 | 4.8 | 6.6 | 10.1 | 14 | 15.8 | 14.5 | 9.7 | 8.6 | 6.1 | 2.8 | 2.1 |
| Precipitation (mm) | 64 | 37 | 82 | 28 | 23 | 28 | 90 | 93 | 46 | 91 | 96 | 52 |
| Sunny days | 10 | 13 | 9 | 18 | 21 | 20 | 7 | 7 | 12 | 7 | 3 | 4 |
| Rainy days | 18 | 8 | 12 | 12 | 10 | 10 | 24 | 24 | 18 | 24 | 19 | 11 |
| Snow days | 3 | 7 | 10 | 8 | 16 |
The best time to visit Mariehamn during the most sunny months:
Months with the longest average daylight duration in Mariehamn:
The largest precipitation sum in Mariehamn is at