Average annual temperature is 6.0 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -30.2 °C
Number of sunny days: 141 days
Number of rainy days: 156 days
Number of snow days: 68 days
Look at detailed online map of Town of Grand Isle
* Weather data for Town of Grand Isle 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) | 3.9 | 6.5 | 6.4 | 17.5 | 31.2 | 32.7 | 31.6 | 24.3 | 29.2 | 23.3 | 8.6 | 13.0 |
| Average daytime temperature (°C) | -3.2 | -6.0 | 1.9 | 9.5 | 16.7 | 21.0 | 26.3 | 21.2 | 21.4 | 14.7 | 2.7 | 0.6 |
| Average temperature (°C) | -7.0 | -11.1 | -2.3 | 3.8 | 10.4 | 15.8 | 21.2 | 17.0 | 15.9 | 10.5 | -1.2 | -2.9 |
| Average night temperature (°C) | -10.7 | -15.4 | -6.0 | -1.2 | 5.0 | 11.3 | 17.0 | 13.6 | 11.7 | 7.0 | -4.3 | -6.2 |
| Absolute minimum temperature (°C) | -22.8 | -30.2 | -14.8 | -11.3 | -0.4 | 5.4 | 12.4 | 9.5 | 4.3 | -3.7 | -10.8 | -15.3 |
| 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 | 15.1 | 15.9 | 15.5 | 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) | 3.0 | 7.0 | 6.7 | 8.4 | 9.7 | 7.5 | 10.7 | 8.2 | 8.4 | 5.5 | 4.8 | 4.0 |
| Precipitation (mm) | 145 | 54 | 63 | 36 | 85 | 151 | 169 | 197 | 123 | 91 | 51 | 84 |
| Sunny days | 8 | 12 | 12 | 14 | 16 | 8 | 2 | 8 | 15 | 13 | 14 | 19 |
| Rainy days | 5 | 3 | 2 | 11 | 15 | 22 | 29 | 23 | 15 | 17 | 9 | 5 |
| Snow days | 18 | 13 | 17 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 7 |
The best time to visit Town of Grand Isle during the most sunny months:
Months with the longest average daylight duration in Town of Grand Isle:
The largest precipitation sum in Town of Grand Isle is at