Average annual temperature is 11.8 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -19.2 °C
Number of sunny days: 164 days
Number of rainy days: 193 days
Number of snow days: 8 days
Look at detailed online map of Chelsea
* Weather data for Chelsea 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 | 16.1 | 16.3 | 31.6 | 29.6 | 33.5 | 31.9 | 30.4 | 33.4 | 27.7 | 19.1 | 14.8 |
| Average daytime temperature (°C) | 7.0 | 7.0 | 9.2 | 17.9 | 21.4 | 25.3 | 28.9 | 26.2 | 23.2 | 18.5 | 9.9 | 8.1 |
| Average temperature (°C) | 3.2 | 1.8 | 3.8 | 11.4 | 14.9 | 19.3 | 23.6 | 21.5 | 18.5 | 13.7 | 5.2 | 3.9 |
| Average night temperature (°C) | 0.0 | -2.4 | -0.7 | 6.4 | 8.7 | 14.5 | 19.4 | 17.5 | 14.9 | 10.0 | 1.6 | 0.7 |
| Absolute minimum temperature (°C) | -5.1 | -19.2 | -8.5 | -1.4 | 3.7 | 9.2 | 15.0 | 13.5 | 7.8 | 4.1 | -3.9 | -6.5 |
| 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) | 4.8 | 6.4 | 7.4 | 8.6 | 12.0 | 10.3 | 11.5 | 9.9 | 7.7 | 7.1 | 7.3 | 4.7 |
| Precipitation (mm) | 123 | 50 | 113 | 88 | 66 | 93 | 178 | 154 | 247 | 109 | 63 | 231 |
| Sunny days | 12 | 15 | 14 | 14 | 21 | 7 | 9 | 9 | 12 | 14 | 21 | 16 |
| Rainy days | 18 | 10 | 16 | 16 | 10 | 23 | 22 | 22 | 18 | 17 | 8 | 13 |
| Snow days | 1 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Chelsea during the most sunny months:
The largest precipitation sum in Chelsea is at