Average annual temperature is 2.6 °C
Absolute maximum temperature: 27.9 °C
Absolute minimum temperature: -21.7 °C
Number of sunny days: 146 days
Number of rainy days: 114 days
Number of snow days: 105 days
Look at detailed online map of Grand Lake
* Weather data for Grand Lake 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) | 3.2 | 5.5 | 6.2 | 13.7 | 19.0 | 22.9 | 27.5 | 27.9 | 24.5 | 19.7 | 9.7 | 6.5 |
| Average daytime temperature (°C) | -3.3 | -1.7 | 0.0 | 6.0 | 13.2 | 17.9 | 23.7 | 23.0 | 18.9 | 11.7 | 3.7 | -0.3 |
| Average temperature (°C) | -7.7 | -7.9 | -5.7 | -0.8 | 6.1 | 10.3 | 15.8 | 15.2 | 11.4 | 4.5 | -3.1 | -7.1 |
| Average night temperature (°C) | -11.1 | -12.2 | -10.6 | -6.4 | 0.2 | 3.6 | 8.8 | 8.9 | 5.0 | -0.5 | -8.4 | -12.0 |
| Absolute minimum temperature (°C) | -19.7 | -19.0 | -19.4 | -14.8 | -1.7 | 0.8 | 2.4 | 5.1 | 0.0 | -14.9 | -18.8 | -21.7 |
| 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 | 15.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 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) | 5.6 | 7.9 | 9.0 | 10.7 | 11.9 | 11.3 | 13.2 | 12.0 | 11.1 | 9.3 | 7.9 | 6.3 |
| Precipitation (mm) | 68 | 35 | 67 | 38 | 39 | 103 | 53 | 66 | 22 | 41 | 12 | 46 |
| Sunny days | 5 | 12 | 8 | 14 | 7 | 8 | 9 | 13 | 18 | 19 | 20 | 13 |
| Rainy days | 2 | 1 | 0 | 2 | 22 | 22 | 22 | 18 | 12 | 9 | 1 | 3 |
| Snow days | 24 | 15 | 23 | 14 | 2 | 0 | 0 | 0 | 0 | 3 | 9 | 15 |
The best time to visit Grand Lake during the most sunny months:
The largest precipitation sum in Grand Lake is at