Average annual temperature is 21.8 °C
Absolute maximum temperature: 40.1 °C
Absolute minimum temperature: 2.1 °C
Number of sunny days: 148 days
Number of rainy days: 217 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) | 23.6 | 25.7 | 28.4 | 29.1 | 31.3 | 33.9 | 36.6 | 40.1 | 35.9 | 34.2 | 27.2 | 23.9 |
| Average daytime temperature (°C) | 19.0 | 19.7 | 23.0 | 24.3 | 28.7 | 32.2 | 32.9 | 35.6 | 32.5 | 26.9 | 20.7 | 18.1 |
| Average temperature (°C) | 14.9 | 15.1 | 18.6 | 19.9 | 24.3 | 28.2 | 29.6 | 31.0 | 27.9 | 22.3 | 16.2 | 13.5 |
| Average night temperature (°C) | 11.6 | 11.8 | 15.1 | 16.2 | 20.5 | 25.0 | 26.9 | 27.7 | 24.3 | 18.8 | 12.9 | 10.0 |
| Absolute minimum temperature (°C) | 2.4 | 2.4 | 2.1 | 10.7 | 14.3 | 20.9 | 24.1 | 23.9 | 21.1 | 9.0 | 5.4 | 3.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.1 | 12.0 | 12.9 | 13.7 | 14.0 | 13.9 | 13.2 | 12.3 | 11.4 | 10.7 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.3 | 7.8 | 8.4 | 9.2 | 10.3 | 11.1 | 12.4 | 12.1 | 10.7 | 8.6 | 7.0 | 7.7 |
| Precipitation (mm) | 213 | 140 | 96 | 170 | 111 | 76 | 77 | 14 | 54 | 32 | 58 | 130 |
| Sunny days | 14 | 10 | 12 | 10 | 9 | 9 | 5 | 10 | 12 | 18 | 18 | 21 |
| Rainy days | 17 | 18 | 19 | 20 | 22 | 21 | 26 | 21 | 18 | 13 | 12 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grand Lake during the most sunny months:
The largest precipitation sum in Grand Lake is at