Average annual temperature is 13.9 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -11.8 °C
Number of sunny days: 192 days
Number of rainy days: 172 days
Number of snow days: 1 day
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) | 17.6 | 20.8 | 22.0 | 27.3 | 30.9 | 34.5 | 35.9 | 34.9 | 31.8 | 29.6 | 24.8 | 16.3 |
| Average daytime temperature (°C) | 7.3 | 11.0 | 12.2 | 19.6 | 24.9 | 29.1 | 30.7 | 29.0 | 26.8 | 20.1 | 13.5 | 9.3 |
| Average temperature (°C) | 3.3 | 5.0 | 6.4 | 12.6 | 18.6 | 22.8 | 25.2 | 23.9 | 21.1 | 14.9 | 7.8 | 5.0 |
| Average night temperature (°C) | 0.3 | 0.7 | 1.9 | 7.1 | 12.7 | 17.4 | 20.2 | 19.3 | 16.2 | 10.6 | 3.4 | 2.0 |
| Absolute minimum temperature (°C) | -11.8 | -10.8 | -6.8 | 0.2 | 4.4 | 12.1 | 16.5 | 14.1 | 11.6 | -2.7 | -7.2 | -7.0 |
| 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 | 14.9 | 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) | 4.2 | 7.4 | 6.8 | 9.4 | 11.3 | 12.2 | 12.4 | 10.8 | 10.5 | 7.5 | 8.0 | 5.1 |
| Precipitation (mm) | 119 | 87 | 215 | 80 | 29 | 67 | 98 | 119 | 37 | 75 | 26 | 51 |
| Sunny days | 13 | 18 | 16 | 18 | 17 | 18 | 8 | 13 | 18 | 18 | 22 | 13 |
| Rainy days | 17 | 10 | 15 | 12 | 14 | 12 | 23 | 18 | 12 | 13 | 8 | 18 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sullivan during the most sunny months:
The largest precipitation sum in Sullivan is at