Average annual temperature is 8.9 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: -30.7 °C
Number of sunny days: 143 days
Number of rainy days: 193 days
Number of snow days: 29 days
Look at detailed online map of Town of Sullivan
* Weather data for Town of 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) | 9.2 | 11.5 | 12.1 | 28.3 | 29.4 | 32.4 | 29.8 | 26.4 | 30.5 | 26.8 | 15.2 | 14.2 |
| Average daytime temperature (°C) | 2.6 | 2.5 | 5.0 | 13.8 | 19.1 | 21.9 | 25.9 | 23.3 | 21.2 | 16.1 | 6.0 | 5.3 |
| Average temperature (°C) | -1.0 | -3.1 | 0.3 | 8.0 | 12.8 | 16.8 | 21.3 | 18.8 | 16.8 | 11.7 | 1.7 | 1.3 |
| Average night temperature (°C) | -4.4 | -8.2 | -3.8 | 3.3 | 6.9 | 12.6 | 17.5 | 15.1 | 13.4 | 8.1 | -1.7 | -1.4 |
| Absolute minimum temperature (°C) | -13.0 | -30.7 | -9.3 | -4.5 | -0.5 | 5.9 | 11.8 | 11.7 | 7.6 | -1.4 | -8.1 | -8.9 |
| 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 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.7 | 6.3 | 6.9 | 8.1 | 11.5 | 9.2 | 9.9 | 9.6 | 7.7 | 6.8 | 6.9 | 4.8 |
| Precipitation (mm) | 150 | 49 | 121 | 84 | 80 | 145 | 278 | 160 | 126 | 83 | 59 | 148 |
| Sunny days | 9 | 13 | 10 | 14 | 18 | 4 | 4 | 9 | 15 | 14 | 20 | 13 |
| Rainy days | 13 | 9 | 11 | 16 | 13 | 26 | 27 | 22 | 15 | 17 | 9 | 15 |
| Snow days | 9 | 6 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The best time to visit Town of Sullivan during the most sunny months:
Months with the longest average daylight duration in Town of Sullivan:
The largest precipitation sum in Town of Sullivan is at