Average annual temperature is 17.2 °C
Absolute maximum temperature: 36.2 °C
Absolute minimum temperature: -3.7 °C
Number of sunny days: 194 days
Number of rainy days: 171 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) | 20.6 | 25.4 | 27.5 | 29.0 | 32.1 | 33.1 | 36.2 | 36.2 | 34.0 | 28.3 | 26.4 | 21.0 |
| Average daytime temperature (°C) | 14.6 | 17.9 | 19.1 | 23.0 | 24.9 | 29.0 | 33.6 | 32.4 | 28.5 | 23.4 | 17.2 | 14.2 |
| Average temperature (°C) | 9.3 | 12.4 | 12.9 | 16.7 | 19.1 | 22.8 | 26.9 | 26.2 | 22.4 | 17.3 | 11.3 | 8.8 |
| Average night temperature (°C) | 5.2 | 7.8 | 7.4 | 10.9 | 14.3 | 17.6 | 21.9 | 21.3 | 17.4 | 12.2 | 6.7 | 4.6 |
| Absolute minimum temperature (°C) | -3.7 | -2.8 | -2.1 | 3.3 | 7.3 | 12.0 | 19.1 | 19.3 | 13.5 | 7.2 | -2.4 | -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 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.5 | 7.4 | 8.3 | 9.3 | 9.6 | 10.9 | 11.7 | 10.9 | 10.0 | 8.9 | 7.8 | 6.4 |
| Precipitation (mm) | 134 | 83 | 140 | 107 | 96 | 99 | 60 | 160 | 40 | 33 | 57 | 140 |
| Sunny days | 17 | 15 | 17 | 14 | 14 | 13 | 9 | 10 | 20 | 23 | 20 | 22 |
| Rainy days | 14 | 13 | 14 | 16 | 17 | 17 | 22 | 21 | 10 | 8 | 10 | 9 |
| Snow days | 0 | 0 | 0 | 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