Average annual temperature is 13.6 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -8.4 °C
Number of sunny days: 175 days
Number of rainy days: 185 days
Number of snow days: 5 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) | 17.0 | 23.8 | 24.5 | 29.5 | 30.6 | 33.4 | 34.2 | 32.5 | 34.2 | 28.9 | 23.0 | 18.5 |
| Average daytime temperature (°C) | 9.4 | 13.5 | 13.2 | 20.1 | 23.5 | 27.5 | 30.0 | 28.5 | 26.5 | 20.2 | 13.5 | 10.4 |
| Average temperature (°C) | 4.5 | 6.3 | 6.6 | 13.0 | 16.9 | 21.0 | 24.1 | 22.8 | 20.2 | 14.6 | 7.4 | 5.5 |
| Average night temperature (°C) | 1.1 | 1.4 | 1.6 | 6.8 | 11.1 | 15.3 | 19.3 | 18.0 | 15.2 | 10.2 | 2.9 | 1.9 |
| Absolute minimum temperature (°C) | -6.7 | -8.4 | -7.5 | -0.1 | 3.4 | 10.0 | 15.7 | 12.6 | 10.1 | 2.6 | -6.5 | -4.8 |
| 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) | 4.3 | 7.3 | 7.6 | 9.2 | 10.2 | 11.3 | 11.7 | 11.0 | 9.5 | 7.6 | 7.2 | 5.2 |
| Precipitation (mm) | 114 | 71 | 89 | 64 | 70 | 66 | 100 | 58 | 59 | 61 | 37 | 76 |
| Sunny days | 9 | 16 | 15 | 14 | 17 | 12 | 9 | 15 | 15 | 17 | 21 | 15 |
| Rainy days | 20 | 11 | 15 | 16 | 14 | 18 | 22 | 16 | 15 | 14 | 8 | 16 |
| Snow days | 2 | 1 | 1 | 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