Average annual temperature is 14.2 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 179 days
Number of rainy days: 183 days
Number of snow days: 3 days
Look at detailed online map of Cornwell
* Weather data for Cornwell 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) | 18.7 | 24.5 | 24.5 | 28.4 | 28.9 | 32.0 | 35.3 | 35.8 | 33.8 | 28.8 | 26.2 | 18.6 |
| Average daytime temperature (°C) | 10.4 | 13.8 | 14.2 | 20.0 | 23.6 | 27.3 | 30.6 | 29.8 | 27.3 | 20.8 | 14.5 | 11.3 |
| Average temperature (°C) | 5.5 | 7.4 | 7.7 | 13.3 | 17.2 | 21.0 | 24.5 | 23.6 | 20.8 | 15.2 | 8.4 | 6.0 |
| Average night temperature (°C) | 2.2 | 2.9 | 2.7 | 7.6 | 11.9 | 15.6 | 19.6 | 18.6 | 15.6 | 10.8 | 4.0 | 2.5 |
| Absolute minimum temperature (°C) | -6.1 | -7.5 | -8.1 | 0.2 | 3.5 | 10.2 | 15.6 | 12.3 | 11.8 | 3.5 | -6.0 | -6.5 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| 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) | 4.5 | 7.2 | 7.8 | 9.9 | 10.5 | 11.2 | 11.7 | 10.7 | 10.4 | 8.0 | 7.2 | 5.6 |
| Precipitation (mm) | 130 | 89 | 98 | 68 | 62 | 100 | 47 | 132 | 32 | 40 | 48 | 89 |
| Sunny days | 10 | 15 | 17 | 18 | 16 | 16 | 6 | 14 | 14 | 19 | 21 | 13 |
| Rainy days | 19 | 13 | 13 | 12 | 15 | 14 | 25 | 17 | 16 | 12 | 9 | 18 |
| Snow days | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Cornwell during the most sunny months:
The largest precipitation sum in Cornwell is at