Average annual temperature is 14.5 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: -11.0 °C
Number of sunny days: 203 days
Number of rainy days: 158 days
Number of snow days: 4 days
Look at detailed online map of Sumner
* Weather data for Sumner 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) | 18.1 | 22.3 | 23.1 | 27.9 | 31.2 | 35.6 | 35.7 | 36.6 | 31.7 | 29.5 | 25.5 | 16.8 |
| Average daytime temperature (°C) | 8.2 | 11.7 | 13.2 | 20.3 | 25.4 | 29.7 | 31.0 | 29.5 | 27.1 | 20.4 | 14.0 | 10.0 |
| Average temperature (°C) | 3.9 | 5.6 | 7.1 | 13.4 | 19.3 | 23.4 | 25.6 | 24.2 | 21.5 | 15.3 | 8.5 | 5.5 |
| Average night temperature (°C) | 0.6 | 1.4 | 2.5 | 7.8 | 13.4 | 17.8 | 20.8 | 19.8 | 16.5 | 11.1 | 4.2 | 2.3 |
| Absolute minimum temperature (°C) | -11.0 | -10.5 | -6.8 | 0.2 | 5.8 | 12.3 | 17.3 | 14.2 | 12.6 | -2.3 | -6.2 | -6.5 |
| 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 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 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) | 4.6 | 7.7 | 7.3 | 9.7 | 11.2 | 12.1 | 12.4 | 10.8 | 10.5 | 7.6 | 7.9 | 5.7 |
| Precipitation (mm) | 131 | 84 | 239 | 97 | 55 | 56 | 55 | 153 | 33 | 63 | 25 | 74 |
| Sunny days | 15 | 17 | 14 | 18 | 18 | 19 | 8 | 15 | 20 | 19 | 24 | 16 |
| Rainy days | 14 | 10 | 16 | 12 | 13 | 11 | 23 | 16 | 10 | 12 | 6 | 15 |
| Snow days | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sumner during the most sunny months:
The largest precipitation sum in Sumner is at