Average annual temperature is 3.6 °C
Absolute maximum temperature: 13.6 °C
Absolute minimum temperature: -9.1 °C
Number of sunny days: 114 days
Number of rainy days: 190 days
Number of snow days: 61 days
Look at detailed online map of Grímsey
* Weather data for Grímsey Iceland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 8.1 | 8.4 | 5.4 | 7.2 | 8.9 | 13.5 | 8.8 | 12.5 | 13.6 | 8.9 | 8.7 | 7.5 |
| Average daytime temperature (°C) | 2.0 | 3.5 | -1.6 | 2.7 | 5.4 | 8.9 | 6.9 | 9.4 | 8.3 | 5.5 | 4.6 | 1.7 |
| Average temperature (°C) | 0.2 | 2.0 | -2.6 | 1.7 | 4.0 | 7.5 | 6.3 | 8.5 | 7.4 | 4.6 | 3.6 | 0.3 |
| Average night temperature (°C) | -1.6 | 0.6 | -3.8 | 0.8 | 2.7 | 6.4 | 5.7 | 7.6 | 6.7 | 3.8 | 2.5 | -1.0 |
| Absolute minimum temperature (°C) | -6.1 | -3.5 | -9.1 | -3.3 | -2.5 | 3.7 | 3.6 | 5.1 | 3.0 | -0.6 | -1.4 | -6.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 6.0 | 9.0 | 13.0 | 17.0 | 22.0 | 24.0 | 24.0 | 18.0 | 14.0 | 11.0 | 7.0 | 3.0 |
| Daylight mean duration (h) | 4.4 | 8.1 | 11.7 | 15.5 | 19.6 | 23.8 | 21.5 | 16.9 | 13.2 | 9.5 | 5.7 | 2.7 |
| Daylight minimum duration (h) | 2.0 | 6.0 | 9.0 | 13.0 | 17.0 | 22.0 | 19.0 | 15.0 | 11.0 | 7.0 | 3.0 | 2.0 |
| Sunshine mean duration (h) | 0.3 | 2.2 | 5.2 | 7.3 | 8.7 | 10.8 | 7.0 | 9.3 | 4.7 | 2.7 | 1.4 | 0.2 |
| Precipitation (mm) | 102 | 77 | 69 | 27 | 54 | 50 | 64 | 42 | 112 | 120 | 49 | 95 |
| Sunny days | 2 | 7 | 5 | 15 | 8 | 12 | 14 | 19 | 6 | 11 | 8 | 7 |
| Rainy days | 16 | 12 | 6 | 12 | 21 | 18 | 17 | 12 | 24 | 19 | 21 | 12 |
| Snow days | 13 | 9 | 20 | 3 | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 12 |
The best time to visit Grímsey during the most sunny months:
Months with the longest average daylight duration in Grímsey:
The largest precipitation sum in Grímsey is at