Average annual temperature is 12.6 °C
Absolute maximum temperature: 32.5 °C
Absolute minimum temperature: -12.4 °C
Number of sunny days: 142 days
Number of rainy days: 211 days
Number of snow days: 12 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) | 19.1 | 21.2 | 22.6 | 28.5 | 29.3 | 32.5 | 32.1 | 30.5 | 31.6 | 27.1 | 19.6 | 17.9 |
| Average daytime temperature (°C) | 8.9 | 11.8 | 11.5 | 19.4 | 22.0 | 25.7 | 28.3 | 26.9 | 23.8 | 18.4 | 12.0 | 9.4 |
| Average temperature (°C) | 4.2 | 5.4 | 5.5 | 12.5 | 15.6 | 19.5 | 23.0 | 21.5 | 18.5 | 13.4 | 6.5 | 5.1 |
| Average night temperature (°C) | 1.0 | 0.6 | 1.0 | 7.0 | 9.7 | 14.2 | 18.9 | 17.2 | 14.3 | 9.3 | 2.3 | 2.0 |
| Absolute minimum temperature (°C) | -6.5 | -12.4 | -8.2 | -0.7 | 1.9 | 10.0 | 15.3 | 12.4 | 9.1 | 1.5 | -6.8 | -4.3 |
| 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) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 3.2 | 6.6 | 6.5 | 8.6 | 9.9 | 11.2 | 11.2 | 10.5 | 9.1 | 6.7 | 6.8 | 4.5 |
| Precipitation (mm) | 127 | 88 | 117 | 53 | 118 | 134 | 111 | 133 | 78 | 125 | 57 | 78 |
| Sunny days | 5 | 12 | 11 | 15 | 16 | 11 | 6 | 9 | 12 | 13 | 18 | 14 |
| Rainy days | 21 | 13 | 18 | 15 | 15 | 19 | 25 | 22 | 18 | 18 | 11 | 16 |
| Snow days | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Cornish during the most sunny months:
The largest precipitation sum in Cornish is at