Average annual temperature is 11.4 °C
Absolute maximum temperature: 30.0 °C
Absolute minimum temperature: -11.9 °C
Number of sunny days: 140 days
Number of rainy days: 216 days
Number of snow days: 9 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) | 17.9 | 23.0 | 20.7 | 25.9 | 24.8 | 28.5 | 30.0 | 29.0 | 28.7 | 25.4 | 22.0 | 15.4 |
| Average daytime temperature (°C) | 8.3 | 11.1 | 11.0 | 17.6 | 19.2 | 22.6 | 26.7 | 24.9 | 22.4 | 17.4 | 11.6 | 8.3 |
| Average temperature (°C) | 3.1 | 5.3 | 5.2 | 11.3 | 13.9 | 17.4 | 21.5 | 20.1 | 17.2 | 12.2 | 5.8 | 3.7 |
| Average night temperature (°C) | 0.0 | 0.9 | 0.7 | 6.4 | 9.5 | 13.0 | 17.4 | 16.6 | 13.3 | 8.2 | 1.7 | 0.5 |
| Absolute minimum temperature (°C) | -10.0 | -11.9 | -11.4 | -1.4 | 1.4 | 7.5 | 15.0 | 10.8 | 9.9 | 1.1 | -9.2 | -6.7 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 4.4 | 6.7 | 7.3 | 9.7 | 10.1 | 11.2 | 12.0 | 9.9 | 9.6 | 7.8 | 7.2 | 5.1 |
| Precipitation (mm) | 91 | 108 | 92 | 95 | 97 | 59 | 84 | 92 | 60 | 50 | 53 | 97 |
| Sunny days | 10 | 9 | 14 | 14 | 12 | 9 | 8 | 7 | 13 | 12 | 19 | 13 |
| Rainy days | 19 | 16 | 17 | 15 | 19 | 21 | 23 | 24 | 17 | 19 | 11 | 15 |
| Snow days | 2 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Sullivan during the most sunny months:
The largest precipitation sum in Sullivan is at