Average annual temperature is 11.2 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -17.0 °C
Number of sunny days: 173 days
Number of rainy days: 175 days
Number of snow days: 17 days
Look at detailed online map of Cromwell
* Weather data for Cromwell 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) | 15.7 | 14.3 | 16.5 | 25.7 | 30.7 | 32.9 | 32.3 | 32.0 | 31.3 | 28.3 | 18.2 | 13.8 |
| Average daytime temperature (°C) | 3.8 | 6.8 | 7.4 | 16.2 | 21.8 | 26.9 | 28.3 | 26.2 | 23.8 | 16.7 | 9.8 | 6.7 |
| Average temperature (°C) | 0.4 | 1.1 | 2.4 | 9.7 | 15.5 | 20.4 | 22.9 | 21.2 | 18.7 | 12.3 | 4.9 | 3.5 |
| Average night temperature (°C) | -2.1 | -2.7 | -1.2 | 4.4 | 9.7 | 14.7 | 17.8 | 16.8 | 14.4 | 8.8 | 1.1 | 1.2 |
| Absolute minimum temperature (°C) | -13.9 | -17.0 | -8.4 | -3.3 | 1.5 | 9.9 | 13.8 | 11.1 | 9.1 | -3.3 | -7.8 | -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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| 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) | 3.0 | 7.5 | 6.4 | 9.0 | 10.4 | 11.2 | 12.1 | 10.5 | 8.9 | 6.9 | 6.9 | 3.7 |
| Precipitation (mm) | 76 | 95 | 156 | 84 | 56 | 52 | 139 | 137 | 44 | 125 | 23 | 77 |
| Sunny days | 10 | 16 | 12 | 15 | 20 | 14 | 12 | 15 | 16 | 11 | 21 | 11 |
| Rainy days | 14 | 10 | 15 | 15 | 11 | 16 | 19 | 16 | 14 | 20 | 7 | 18 |
| Snow days | 7 | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
The best time to visit Cromwell during the most sunny months:
The largest precipitation sum in Cromwell is at