Average annual temperature is 11.5 °C
Absolute maximum temperature: 26.4 °C
Absolute minimum temperature: -4.3 °C
Number of sunny days: 81 days
Number of rainy days: 283 days
Number of snow days: 1 day
Look at detailed online map of Cornwall
* Weather data for Cornwall United Kingdom is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 12.5 | 11.7 | 13.9 | 14.9 | 21.5 | 24.1 | 21.4 | 22.1 | 26.4 | 21.9 | 14.6 | 13.2 |
| Average daytime temperature (°C) | 8.5 | 9.4 | 10.4 | 11.9 | 16.5 | 20.7 | 18.0 | 18.4 | 19.7 | 15.5 | 10.9 | 10.5 |
| Average temperature (°C) | 6.2 | 6.6 | 7.8 | 9.0 | 12.7 | 16.8 | 15.5 | 15.7 | 16.5 | 13.0 | 9.2 | 8.8 |
| Average night temperature (°C) | 3.4 | 3.9 | 5.5 | 6.1 | 8.9 | 12.9 | 13.0 | 13.1 | 13.2 | 10.5 | 7.2 | 6.6 |
| Absolute minimum temperature (°C) | -3.6 | -0.9 | -1.1 | 2.4 | 6.2 | 8.6 | 9.6 | 10.2 | 8.7 | 6.4 | 0.5 | -4.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.6 | 10.1 | 11.9 | 13.8 | 15.5 | 16.4 | 15.9 | 14.5 | 12.6 | 10.7 | 9.0 | 8.1 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.8 | 5.2 | 5.1 | 8.0 | 11.9 | 12.5 | 9.6 | 8.6 | 8.3 | 5.5 | 4.1 | 2.8 |
| Precipitation (mm) | 166 | 22 | 225 | 97 | 70 | 56 | 191 | 128 | 96 | 137 | 170 | 192 |
| Sunny days | 9 | 13 | 5 | 8 | 17 | 12 | 0 | 2 | 4 | 6 | 2 | 3 |
| Rainy days | 21 | 15 | 26 | 22 | 14 | 18 | 31 | 29 | 26 | 25 | 28 | 28 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Cornwall during the most sunny months:
Months with the longest average daylight duration in Cornwall:
The largest precipitation sum in Cornwall is at