Average annual temperature is 10.3 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -23.3 °C
Number of sunny days: 218 days
Number of rainy days: 114 days
Number of snow days: 33 days
Look at detailed online map of Cornish
* Weather data for Cornish 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) | 13.7 | 15.3 | 21.8 | 28.5 | 26.4 | 33.0 | 35.4 | 37.7 | 35.2 | 29.5 | 23.1 | 15.5 |
| Average daytime temperature (°C) | 2.1 | 7.7 | 9.9 | 17.7 | 22.4 | 24.8 | 30.3 | 31.0 | 27.7 | 19.3 | 12.9 | 8.5 |
| Average temperature (°C) | -3.4 | -1.6 | 1.8 | 8.4 | 15.3 | 18.1 | 22.6 | 23.2 | 19.9 | 11.5 | 4.5 | 1.8 |
| Average night temperature (°C) | -7.8 | -7.7 | -3.8 | 1.1 | 9.1 | 12.4 | 15.7 | 16.4 | 12.4 | 4.9 | -1.4 | -2.8 |
| Absolute minimum temperature (°C) | -23.3 | -22.9 | -12.2 | -8.9 | 4.3 | 8.8 | 11.6 | 10.9 | 7.1 | -9.2 | -9.0 | -6.6 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.3 |
| 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) | 6.1 | 8.7 | 9.3 | 10.2 | 10.8 | 11.3 | 12.5 | 11.9 | 10.9 | 9.1 | 7.6 | 7.2 |
| Precipitation (mm) | 35 | 11 | 30 | 32 | 95 | 121 | 71 | 20 | 21 | 18 | 13 | 6 |
| Sunny days | 13 | 21 | 17 | 17 | 10 | 7 | 14 | 22 | 23 | 25 | 25 | 24 |
| Rainy days | 6 | 3 | 6 | 12 | 21 | 23 | 17 | 9 | 7 | 4 | 3 | 3 |
| Snow days | 12 | 4 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 4 |
The best time to visit Cornish during the most sunny months:
The largest precipitation sum in Cornish is at