Average annual temperature is 6.2 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -29.9 °C
Number of sunny days: 176 days
Number of rainy days: 134 days
Number of snow days: 55 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) | 1.9 | 5.6 | 5.1 | 19.3 | 29.5 | 29.4 | 30.3 | 29.0 | 34.2 | 27.7 | 16.4 | 8.8 |
| Average daytime temperature (°C) | -5.0 | -3.6 | 0.1 | 7.3 | 19.9 | 24.7 | 24.4 | 24.4 | 21.6 | 11.9 | 4.1 | 2.1 |
| Average temperature (°C) | -8.1 | -8.7 | -4.5 | 1.9 | 12.6 | 18.1 | 18.9 | 18.9 | 16.7 | 8.2 | -0.1 | -1.0 |
| Average night temperature (°C) | -10.8 | -13.0 | -8.3 | -2.1 | 7.3 | 13.1 | 14.1 | 14.6 | 13.3 | 5.5 | -3.1 | -3.2 |
| Absolute minimum temperature (°C) | -27.6 | -29.9 | -15.5 | -11.8 | -1.5 | 6.6 | 9.6 | 10.1 | 4.6 | -6.2 | -14.5 | -12.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.0 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.3 | 6.8 | 7.0 | 7.1 | 11.4 | 12.3 | 12.4 | 10.6 | 7.7 | 5.9 | 4.8 | 3.3 |
| Precipitation (mm) | 37 | 45 | 59 | 91 | 64 | 90 | 82 | 61 | 144 | 57 | 20 | 63 |
| Sunny days | 15 | 17 | 13 | 12 | 19 | 17 | 10 | 18 | 10 | 12 | 18 | 15 |
| Rainy days | 1 | 4 | 5 | 12 | 12 | 13 | 21 | 13 | 20 | 16 | 7 | 10 |
| Snow days | 15 | 7 | 13 | 6 | 0 | 0 | 0 | 0 | 0 | 3 | 5 | 6 |
The best time to visit Grand Lake during the most sunny months:
Months with the longest average daylight duration in Grand Lake:
The largest precipitation sum in Grand Lake is at