Average annual temperature is 8.9 °C
Absolute maximum temperature: 30.6 °C
Absolute minimum temperature: -28.9 °C
Number of sunny days: 158 days
Number of rainy days: 177 days
Number of snow days: 30 days
Look at detailed online map of West Sullivan
* Weather data for West Sullivan 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) | 9.3 | 11.0 | 11.1 | 20.9 | 28.7 | 28.8 | 29.7 | 26.4 | 30.6 | 26.9 | 13.0 | 13.5 |
| Average daytime temperature (°C) | 2.8 | 1.2 | 4.6 | 11.4 | 17.8 | 19.9 | 25.8 | 23.2 | 22.7 | 16.8 | 6.7 | 4.3 |
| Average temperature (°C) | -0.7 | -3.7 | 0.9 | 6.8 | 12.3 | 15.3 | 21.2 | 19.2 | 17.9 | 12.9 | 3.0 | 0.9 |
| Average night temperature (°C) | -3.8 | -8.5 | -2.3 | 3.1 | 8.0 | 12.1 | 17.9 | 16.1 | 14.4 | 10.0 | -0.1 | -2.0 |
| Absolute minimum temperature (°C) | -10.0 | -28.9 | -8.1 | -3.1 | 3.5 | 6.9 | 15.5 | 13.5 | 9.1 | 1.9 | -6.4 | -11.0 |
| 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) | 9.3 | 10.4 | 11.9 | 13.5 | 14.8 | 15.5 | 15.2 | 14.0 | 12.5 | 11.0 | 9.6 | 8.9 |
| 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) | 4.2 | 6.5 | 7.0 | 8.2 | 11.1 | 6.7 | 8.7 | 9.2 | 8.6 | 6.7 | 6.6 | 4.1 |
| Precipitation (mm) | 199 | 39 | 76 | 55 | 120 | 178 | 185 | 138 | 137 | 137 | 52 | 144 |
| Sunny days | 7 | 12 | 13 | 16 | 19 | 5 | 9 | 11 | 18 | 11 | 20 | 17 |
| Rainy days | 14 | 4 | 12 | 14 | 12 | 25 | 22 | 20 | 12 | 20 | 9 | 13 |
| Snow days | 10 | 12 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit West Sullivan during the most sunny months:
Months with the longest average daylight duration in West Sullivan:
The largest precipitation sum in West Sullivan is at