Average annual temperature is 9.6 °C
Absolute maximum temperature: 28.9 °C
Absolute minimum temperature: -16.4 °C
Number of sunny days: 136 days
Number of rainy days: 205 days
Number of snow days: 24 days
Look at detailed online map of Grantsville
* Weather data for Grantsville United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 16.3 | 16.7 | 18.4 | 24.7 | 24.0 | 28.7 | 28.9 | 28.7 | 28.0 | 23.3 | 16.0 | 13.9 |
| Average daytime temperature (°C) | 5.0 | 8.0 | 8.0 | 16.1 | 17.8 | 21.6 | 25.1 | 23.9 | 20.3 | 15.1 | 8.4 | 5.9 |
| Average temperature (°C) | 1.0 | 2.3 | 2.3 | 9.8 | 12.3 | 16.3 | 20.3 | 18.8 | 15.6 | 10.7 | 3.5 | 2.3 |
| Average night temperature (°C) | -1.7 | -2.2 | -1.5 | 4.7 | 7.4 | 11.8 | 16.3 | 14.8 | 11.9 | 7.1 | -0.3 | -0.6 |
| Absolute minimum temperature (°C) | -10.7 | -16.4 | -11.8 | -3.1 | -0.6 | 7.0 | 12.2 | 9.3 | 6.5 | -2.3 | -10.2 | -7.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.3 | 6.8 | 7.0 | 8.8 | 10.3 | 10.6 | 11.7 | 10.6 | 8.6 | 7.0 | 6.6 | 4.2 |
| Precipitation (mm) | 108 | 85 | 107 | 72 | 96 | 105 | 97 | 114 | 84 | 71 | 68 | 89 |
| Sunny days | 5 | 12 | 9 | 13 | 17 | 11 | 5 | 7 | 16 | 12 | 18 | 11 |
| Rainy days | 20 | 11 | 17 | 16 | 14 | 19 | 26 | 24 | 14 | 19 | 9 | 16 |
| Snow days | 6 | 5 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 4 |
The best time to visit Grantsville during the most sunny months: