Average annual temperature is 15.2 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -6.7 °C
Number of sunny days: 162 days
Number of rainy days: 203 days
Look at detailed online map of Sumner County
* Weather data for Sumner County 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) | 18.8 | 23.5 | 23.4 | 27.3 | 29.6 | 33.1 | 35.3 | 37.0 | 31.1 | 29.0 | 25.5 | 18.0 |
| Average daytime temperature (°C) | 10.8 | 14.4 | 15.0 | 20.1 | 25.1 | 29.0 | 30.8 | 29.8 | 26.9 | 21.4 | 15.7 | 11.4 |
| Average temperature (°C) | 6.5 | 8.4 | 9.2 | 13.9 | 18.9 | 22.5 | 24.9 | 24.3 | 21.1 | 15.9 | 9.7 | 6.3 |
| Average night temperature (°C) | 3.1 | 4.3 | 4.6 | 8.8 | 13.9 | 17.1 | 20.4 | 19.9 | 16.4 | 11.5 | 5.4 | 2.7 |
| Absolute minimum temperature (°C) | -3.9 | -6.1 | -6.7 | 2.0 | 5.3 | 11.1 | 15.8 | 14.4 | 12.0 | -1.0 | -4.4 | -6.1 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.8 | 6.2 | 7.8 | 9.1 | 10.7 | 11.7 | 11.3 | 9.9 | 10.3 | 7.8 | 7.8 | 6.3 |
| Precipitation (mm) | 164 | 171 | 140 | 94 | 126 | 92 | 184 | 187 | 103 | 46 | 57 | 83 |
| Sunny days | 11 | 11 | 17 | 14 | 14 | 11 | 4 | 12 | 14 | 17 | 21 | 16 |
| Rainy days | 20 | 17 | 14 | 16 | 17 | 19 | 27 | 19 | 16 | 14 | 9 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sumner County during the most sunny months:
The largest precipitation sum in Sumner County is at