Average annual temperature is 15.2 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 178 days
Number of rainy days: 186 days
Number of snow days: 1 day
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) | 17.8 | 21.0 | 23.0 | 28.7 | 26.7 | 30.5 | 35.8 | 33.3 | 33.9 | 27.7 | 24.3 | 17.2 |
| Average daytime temperature (°C) | 10.7 | 11.7 | 13.2 | 21.1 | 21.8 | 26.4 | 30.9 | 29.6 | 26.3 | 21.6 | 14.0 | 11.4 |
| Average temperature (°C) | 6.8 | 7.2 | 8.1 | 15.4 | 16.9 | 21.4 | 26.2 | 25.0 | 21.8 | 16.7 | 9.1 | 7.4 |
| Average night temperature (°C) | 3.7 | 3.0 | 3.6 | 11.1 | 12.4 | 17.2 | 22.2 | 21.2 | 18.1 | 12.8 | 5.2 | 4.0 |
| Absolute minimum temperature (°C) | -2.9 | -8.1 | -2.0 | 3.9 | 6.9 | 12.2 | 19.2 | 17.0 | 13.3 | 7.1 | -3.5 | -1.3 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 5.6 | 7.3 | 7.7 | 9.7 | 11.1 | 11.3 | 11.8 | 10.5 | 8.3 | 8.9 | 7.7 | 5.5 |
| Precipitation (mm) | 70 | 60 | 52 | 118 | 78 | 122 | 124 | 70 | 106 | 27 | 65 | 157 |
| Sunny days | 14 | 16 | 16 | 16 | 16 | 11 | 5 | 12 | 13 | 20 | 23 | 16 |
| Rainy days | 17 | 12 | 14 | 14 | 15 | 19 | 26 | 19 | 17 | 11 | 7 | 15 |
| Snow days | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit West Haven during the most sunny months:
The largest precipitation sum in West Haven is at