Average annual temperature is 18.8 °C
Absolute maximum temperature: 42.8 °C
Absolute minimum temperature: -8.4 °C
Number of sunny days: 216 days
Number of rainy days: 149 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) | 25.2 | 26.8 | 28.1 | 30.7 | 33.8 | 40.8 | 40.7 | 42.8 | 40.7 | 32.2 | 28.9 | 22.8 |
| Average daytime temperature (°C) | 15.6 | 15.6 | 19.1 | 22.4 | 27.9 | 33.0 | 36.5 | 38.6 | 33.3 | 24.7 | 18.3 | 14.5 |
| Average temperature (°C) | 9.0 | 8.3 | 12.7 | 16.4 | 21.9 | 26.7 | 30.1 | 32.1 | 27.1 | 19.1 | 12.3 | 9.1 |
| Average night temperature (°C) | 4.0 | 3.5 | 8.1 | 11.3 | 17.2 | 21.5 | 24.9 | 26.0 | 22.0 | 14.5 | 7.7 | 5.1 |
| Absolute minimum temperature (°C) | -8.4 | -5.4 | -3.0 | 5.6 | 10.1 | 16.9 | 20.3 | 19.8 | 16.9 | -1.2 | -2.5 | -2.3 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 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) | 7.6 | 6.8 | 8.3 | 9.5 | 10.3 | 11.7 | 11.9 | 12.5 | 9.8 | 8.5 | 8.2 | 7.2 |
| Precipitation (mm) | 28 | 98 | 124 | 50 | 61 | 70 | 43 | 4 | 122 | 132 | 24 | 57 |
| Sunny days | 22 | 14 | 19 | 17 | 8 | 11 | 17 | 24 | 17 | 21 | 22 | 24 |
| Rainy days | 9 | 14 | 12 | 13 | 23 | 19 | 14 | 7 | 13 | 10 | 8 | 7 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Cornish during the most sunny months:
The largest precipitation sum in Cornish is at