Average annual temperature is 11.4 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: -24.3 °C
Number of sunny days: 157 days
Number of rainy days: 197 days
Number of snow days: 11 days
Look at detailed online map of Dedham
* Weather data for Dedham 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) | 12.8 | 16.2 | 15.0 | 30.2 | 29.7 | 32.5 | 33.0 | 29.9 | 34.7 | 28.1 | 18.8 | 15.6 |
| Average daytime temperature (°C) | 6.3 | 6.3 | 8.6 | 16.3 | 21.2 | 23.8 | 28.8 | 26.3 | 23.3 | 19.1 | 9.5 | 8.1 |
| Average temperature (°C) | 2.5 | 1.2 | 3.6 | 10.3 | 14.6 | 18.1 | 23.7 | 21.1 | 18.7 | 13.9 | 4.4 | 3.7 |
| Average night temperature (°C) | -0.8 | -3.5 | -0.6 | 5.6 | 8.9 | 13.7 | 19.4 | 16.9 | 15.0 | 10.0 | 0.5 | 0.5 |
| Absolute minimum temperature (°C) | -6.4 | -24.3 | -4.6 | -3.0 | 2.5 | 7.5 | 14.2 | 12.5 | 7.3 | 2.6 | -5.2 | -7.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.8 | 6.2 | 7.3 | 8.6 | 11.6 | 9.3 | 11.0 | 9.2 | 7.3 | 7.7 | 6.8 | 5.2 |
| Precipitation (mm) | 162 | 47 | 128 | 68 | 71 | 133 | 198 | 157 | 209 | 92 | 46 | 164 |
| Sunny days | 10 | 12 | 14 | 15 | 20 | 4 | 5 | 11 | 11 | 17 | 22 | 16 |
| Rainy days | 17 | 12 | 16 | 15 | 11 | 26 | 26 | 20 | 19 | 14 | 7 | 14 |
| Snow days | 4 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Dedham during the most sunny months:
The largest precipitation sum in Dedham is at