Average annual temperature is 14.4 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: -9.3 °C
Number of sunny days: 179 days
Number of rainy days: 185 days
Number of snow days: 1 day
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) | 18.3 | 23.4 | 25.6 | 30.8 | 28.3 | 33.6 | 38.1 | 33.8 | 36.7 | 27.3 | 25.1 | 16.2 |
| Average daytime temperature (°C) | 10.1 | 12.1 | 13.2 | 21.9 | 22.8 | 27.8 | 31.5 | 30.2 | 26.5 | 21.1 | 13.6 | 10.5 |
| Average temperature (°C) | 5.7 | 6.6 | 7.3 | 15.1 | 16.6 | 21.4 | 25.5 | 24.4 | 21.1 | 15.2 | 7.6 | 5.8 |
| Average night temperature (°C) | 2.2 | 2.1 | 2.2 | 9.5 | 10.7 | 15.8 | 20.8 | 19.7 | 16.6 | 10.5 | 3.2 | 1.9 |
| Absolute minimum temperature (°C) | -3.4 | -9.3 | -5.1 | 1.6 | 5.1 | 11.6 | 17.4 | 15.3 | 10.4 | 4.2 | -5.5 | -3.9 |
| 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 | 14.8 | 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) | 5.3 | 6.4 | 7.5 | 9.1 | 10.7 | 10.9 | 12.1 | 10.7 | 8.5 | 8.7 | 7.7 | 5.4 |
| Precipitation (mm) | 69 | 68 | 67 | 112 | 39 | 137 | 156 | 63 | 106 | 38 | 67 | 193 |
| Sunny days | 14 | 16 | 15 | 16 | 15 | 13 | 6 | 11 | 15 | 19 | 22 | 17 |
| Rainy days | 17 | 12 | 16 | 14 | 16 | 17 | 25 | 20 | 15 | 12 | 7 | 14 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Sumner during the most sunny months:
The largest precipitation sum in Sumner is at