Average annual temperature is 12.0 °C
Absolute maximum temperature: 34.0 °C
Absolute minimum temperature: -21.5 °C
Number of sunny days: 163 days
Number of rainy days: 196 days
Number of snow days: 6 days
Look at detailed online map of West Haddam
* Weather data for West Haddam 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) | 18.6 | 19.4 | 14.9 | 31.5 | 28.2 | 30.8 | 31.3 | 29.6 | 34.0 | 27.9 | 17.9 | 17.0 |
| Average daytime temperature (°C) | 7.5 | 6.9 | 9.3 | 17.2 | 20.6 | 24.5 | 28.5 | 26.0 | 23.4 | 18.8 | 10.4 | 8.8 |
| Average temperature (°C) | 3.8 | 2.2 | 4.3 | 11.4 | 14.7 | 18.7 | 23.7 | 21.4 | 18.9 | 14.0 | 5.5 | 4.6 |
| Average night temperature (°C) | 0.4 | -2.0 | 0.1 | 6.6 | 9.2 | 14.1 | 20.0 | 17.6 | 15.4 | 10.5 | 1.5 | 1.3 |
| Absolute minimum temperature (°C) | -4.2 | -21.5 | -3.9 | -1.5 | 3.7 | 7.6 | 15.0 | 13.2 | 8.5 | 4.7 | -4.3 | -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 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 6.6 | 7.6 | 8.6 | 12.1 | 10.6 | 11.2 | 9.7 | 7.5 | 8.0 | 7.1 | 5.4 |
| Precipitation (mm) | 171 | 51 | 110 | 113 | 110 | 91 | 194 | 218 | 263 | 70 | 59 | 222 |
| Sunny days | 9 | 14 | 16 | 15 | 20 | 5 | 6 | 9 | 15 | 14 | 21 | 19 |
| Rainy days | 20 | 10 | 15 | 15 | 11 | 25 | 25 | 22 | 15 | 17 | 9 | 12 |
| Snow days | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit West Haddam during the most sunny months:
The largest precipitation sum in West Haddam is at