Average annual temperature is 9.2 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: -34.6 °C
Number of sunny days: 125 days
Number of rainy days: 207 days
Number of snow days: 33 days
Look at detailed online map of Town of Cornwall
* Weather data for Town of Cornwall 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) | 7.5 | 13.6 | 10.5 | 28.3 | 30.6 | 33.1 | 32.2 | 27.0 | 31.0 | 28.4 | 15.8 | 11.5 |
| Average daytime temperature (°C) | 2.0 | 2.6 | 5.0 | 15.7 | 19.8 | 23.8 | 27.4 | 24.1 | 22.6 | 16.8 | 6.7 | 4.7 |
| Average temperature (°C) | -1.4 | -3.5 | 0.1 | 9.0 | 13.2 | 18.1 | 22.0 | 19.2 | 17.3 | 12.4 | 2.4 | 1.1 |
| Average night temperature (°C) | -4.5 | -8.8 | -4.3 | 3.9 | 7.2 | 13.6 | 18.0 | 15.5 | 13.2 | 9.1 | -0.9 | -1.6 |
| Absolute minimum temperature (°C) | -13.2 | -34.6 | -12.6 | -3.8 | 0.8 | 8.0 | 13.6 | 11.1 | 6.4 | -0.2 | -7.1 | -7.4 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.5 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.8 | 5.7 | 5.7 | 7.5 | 11.1 | 9.6 | 10.4 | 9.8 | 8.5 | 6.0 | 5.7 | 2.9 |
| Precipitation (mm) | 115 | 54 | 89 | 90 | 86 | 120 | 243 | 187 | 45 | 120 | 58 | 149 |
| Sunny days | 5 | 6 | 11 | 14 | 20 | 8 | 3 | 7 | 15 | 11 | 15 | 10 |
| Rainy days | 13 | 14 | 15 | 16 | 11 | 22 | 28 | 24 | 15 | 20 | 13 | 16 |
| Snow days | 13 | 8 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
The best time to visit Town of Cornwall during the most sunny months:
Months with the longest average daylight duration in Town of Cornwall:
The largest precipitation sum in Town of Cornwall is at