Average annual temperature is 9.7 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -29.3 °C
Number of sunny days: 128 days
Number of rainy days: 203 days
Number of snow days: 34 days
Look at detailed online map of West Haven
* Weather data for West Haven 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) | 8.4 | 14.2 | 11.1 | 29.4 | 33.2 | 34.3 | 32.1 | 27.9 | 30.9 | 28.1 | 16.4 | 11.5 |
| Average daytime temperature (°C) | 2.7 | 3.3 | 5.9 | 16.5 | 20.8 | 24.5 | 27.6 | 24.6 | 22.8 | 17.3 | 7.4 | 5.1 |
| Average temperature (°C) | -0.8 | -2.7 | 0.7 | 9.4 | 13.8 | 18.7 | 22.4 | 19.7 | 17.9 | 12.7 | 2.9 | 1.4 |
| Average night temperature (°C) | -3.9 | -8.1 | -4.0 | 4.1 | 7.3 | 13.9 | 18.5 | 15.8 | 14.1 | 9.2 | -0.4 | -1.3 |
| Absolute minimum temperature (°C) | -9.7 | -29.3 | -12.0 | -3.5 | 1.5 | 9.1 | 14.1 | 11.5 | 8.2 | 0.5 | -5.5 | -7.2 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 3.2 | 5.9 | 6.1 | 7.6 | 11.3 | 9.8 | 10.4 | 9.9 | 8.1 | 5.7 | 6.0 | 3.7 |
| Precipitation (mm) | 103 | 55 | 90 | 104 | 74 | 127 | 237 | 164 | 64 | 115 | 60 | 159 |
| Sunny days | 8 | 9 | 8 | 14 | 16 | 8 | 3 | 6 | 19 | 10 | 15 | 12 |
| Rainy days | 16 | 12 | 14 | 16 | 15 | 22 | 28 | 25 | 11 | 21 | 10 | 13 |
| Snow days | 7 | 7 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 6 |
The best time to visit West Haven during the most sunny months:
Months with the longest average daylight duration in West Haven:
The largest precipitation sum in West Haven is at