Average annual temperature is 12.0 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -21.3 °C
Number of sunny days: 165 days
Number of rainy days: 191 days
Number of snow days: 9 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) | 18.0 | 18.5 | 15.3 | 31.8 | 27.5 | 32.7 | 32.7 | 29.9 | 35.5 | 28.3 | 18.7 | 17.5 |
| Average daytime temperature (°C) | 7.4 | 6.9 | 9.4 | 17.5 | 21.1 | 25.0 | 29.0 | 26.2 | 23.7 | 18.9 | 10.2 | 8.9 |
| Average temperature (°C) | 3.6 | 2.1 | 4.2 | 11.4 | 14.7 | 18.9 | 23.9 | 21.5 | 19.0 | 14.0 | 5.3 | 4.4 |
| Average night temperature (°C) | 0.2 | -2.1 | -0.1 | 6.5 | 8.9 | 14.2 | 19.9 | 17.6 | 15.4 | 10.3 | 1.5 | 1.2 |
| Absolute minimum temperature (°C) | -4.7 | -21.3 | -5.2 | -1.7 | 2.9 | 7.7 | 14.8 | 13.1 | 7.5 | 4.4 | -4.2 | -6.3 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 6.5 | 7.5 | 8.7 | 11.9 | 10.3 | 11.0 | 9.7 | 7.5 | 7.9 | 7.0 | 5.2 |
| Precipitation (mm) | 173 | 51 | 109 | 100 | 70 | 85 | 207 | 185 | 238 | 75 | 47 | 195 |
| Sunny days | 9 | 14 | 16 | 15 | 20 | 8 | 8 | 10 | 14 | 16 | 18 | 17 |
| Rainy days | 19 | 10 | 13 | 15 | 11 | 22 | 23 | 21 | 16 | 15 | 12 | 14 |
| Snow days | 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Cromwell during the most sunny months:
The largest precipitation sum in Cromwell is at