Average annual temperature is 12.1 °C
Absolute maximum temperature: 40.9 °C
Absolute minimum temperature: -7.0 °C
Number of sunny days: 163 days
Number of rainy days: 202 days
Look at detailed online map of West Haven-Sylvan
* Weather data for West Haven-Sylvan 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) | 11.6 | 12.7 | 17.3 | 26.5 | 30.5 | 31.9 | 35.6 | 40.9 | 32.5 | 27.1 | 17.2 | 15.5 |
| Average daytime temperature (°C) | 8.3 | 8.1 | 10.5 | 13.7 | 22.9 | 25.5 | 30.3 | 31.3 | 24.1 | 18.2 | 11.5 | 9.9 |
| Average temperature (°C) | 4.9 | 3.6 | 5.3 | 8.5 | 15.6 | 17.2 | 21.5 | 22.7 | 17.2 | 12.9 | 7.6 | 6.9 |
| Average night temperature (°C) | 2.3 | 0.8 | 2.1 | 4.7 | 10.0 | 10.9 | 14.3 | 16.1 | 12.4 | 9.5 | 5.0 | 4.8 |
| Absolute minimum temperature (°C) | -4.2 | -7.0 | -1.9 | -1.2 | 4.9 | 6.5 | 11.6 | 11.9 | 8.4 | 2.2 | -2.0 | 0.1 |
| 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 | 8.0 |
| Daylight mean duration (h) | 9.2 | 10.4 | 11.9 | 13.5 | 14.9 | 15.6 | 15.3 | 14.1 | 12.5 | 10.9 | 9.5 | 8.8 |
| 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) | 3.1 | 4.9 | 6.3 | 6.8 | 11.3 | 12.9 | 13.4 | 11.7 | 9.1 | 6.4 | 5.2 | 2.9 |
| Precipitation (mm) | 131 | 92 | 147 | 173 | 46 | 23 | 2 | 21 | 67 | 96 | 150 | 278 |
| Sunny days | 7 | 10 | 4 | 4 | 18 | 21 | 27 | 21 | 16 | 16 | 13 | 6 |
| Rainy days | 24 | 18 | 27 | 26 | 13 | 9 | 4 | 10 | 14 | 15 | 17 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit West Haven-Sylvan during the most sunny months:
Months with the longest average daylight duration in West Haven-Sylvan:
The largest precipitation sum in West Haven-Sylvan is at