Average annual temperature is 15.5 °C
Absolute maximum temperature: 38.4 °C
Absolute minimum temperature: -12.0 °C
Number of sunny days: 247 days
Number of rainy days: 116 days
Number of snow days: 2 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) | 15.6 | 20.2 | 27.3 | 32.5 | 31.5 | 36.7 | 36.8 | 38.4 | 36.9 | 32.1 | 22.7 | 18.1 |
| Average daytime temperature (°C) | 8.9 | 11.2 | 15.2 | 23.2 | 25.8 | 30.3 | 32.7 | 33.7 | 30.5 | 22.3 | 14.1 | 10.9 |
| Average temperature (°C) | 3.1 | 4.1 | 8.5 | 15.2 | 19.9 | 24.6 | 27.1 | 27.8 | 24.5 | 16.5 | 8.6 | 5.8 |
| Average night temperature (°C) | -0.9 | -1.3 | 3.1 | 8.9 | 14.6 | 19.4 | 22.1 | 22.3 | 19.3 | 11.6 | 3.8 | 2.0 |
| Absolute minimum temperature (°C) | -12.0 | -10.8 | -7.4 | -0.4 | 5.3 | 15.2 | 17.3 | 16.7 | 15.1 | -2.9 | -9.6 | -4.1 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 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) | 7.3 | 8.3 | 8.5 | 10.1 | 10.2 | 11.9 | 12.0 | 12.0 | 10.1 | 8.4 | 7.6 | 6.1 |
| Precipitation (mm) | 38 | 37 | 13 | 40 | 84 | 66 | 85 | 35 | 36 | 109 | 53 | 77 |
| Sunny days | 23 | 20 | 19 | 23 | 15 | 15 | 19 | 23 | 24 | 22 | 22 | 22 |
| Rainy days | 7 | 8 | 12 | 7 | 16 | 15 | 12 | 8 | 6 | 9 | 7 | 9 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Sumner County during the most sunny months:
The largest precipitation sum in Sumner County is at