Average annual temperature is 10.9 °C
Absolute maximum temperature: 30.0 °C
Absolute minimum temperature: -13.2 °C
Number of sunny days: 133 days
Number of rainy days: 218 days
Number of snow days: 14 days
Look at detailed online map of Sullivan
* Weather data for 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) | 18.3 | 19.3 | 20.3 | 26.7 | 24.7 | 28.5 | 30.0 | 28.2 | 28.9 | 25.5 | 21.1 | 16.5 |
| Average daytime temperature (°C) | 7.5 | 10.5 | 10.4 | 17.7 | 18.9 | 22.1 | 26.0 | 24.9 | 22.0 | 16.8 | 11.1 | 8.4 |
| Average temperature (°C) | 2.8 | 4.6 | 4.4 | 10.9 | 13.3 | 16.8 | 21.0 | 19.7 | 16.6 | 11.6 | 4.9 | 3.5 |
| Average night temperature (°C) | -0.6 | -0.1 | -0.3 | 5.2 | 8.0 | 11.9 | 16.7 | 15.5 | 12.3 | 7.4 | 0.4 | 0.0 |
| Absolute minimum temperature (°C) | -8.8 | -13.2 | -11.1 | -4.1 | 0.5 | 5.7 | 12.8 | 10.1 | 5.3 | -0.7 | -9.0 | -7.2 |
| 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 | 10.7 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.7 | 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) | 3.3 | 6.3 | 6.9 | 8.8 | 9.3 | 10.6 | 12.0 | 10.5 | 8.9 | 7.1 | 6.7 | 4.5 |
| Precipitation (mm) | 126 | 99 | 105 | 64 | 139 | 93 | 122 | 123 | 98 | 72 | 71 | 102 |
| Sunny days | 4 | 10 | 11 | 15 | 14 | 11 | 5 | 9 | 11 | 13 | 19 | 11 |
| Rainy days | 22 | 15 | 17 | 15 | 17 | 19 | 26 | 22 | 19 | 18 | 9 | 19 |
| Snow days | 5 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 |
The best time to visit Sullivan during the most sunny months:
The largest precipitation sum in Sullivan is at