Average annual temperature is 11.0 °C
Absolute maximum temperature: 38.3 °C
Absolute minimum temperature: -22.8 °C
Number of sunny days: 223 days
Number of rainy days: 118 days
Number of snow days: 24 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) | 6.9 | 13.2 | 18.8 | 28.2 | 27.5 | 32.4 | 36.5 | 38.3 | 35.3 | 29.6 | 19.0 | 14.3 |
| Average daytime temperature (°C) | -0.5 | 4.4 | 8.6 | 17.9 | 23.7 | 27.8 | 30.0 | 31.1 | 27.3 | 17.7 | 11.7 | 5.9 |
| Average temperature (°C) | -4.4 | -2.3 | 1.3 | 10.3 | 17.6 | 21.7 | 23.8 | 24.9 | 20.8 | 11.7 | 5.5 | 0.9 |
| Average night temperature (°C) | -7.7 | -6.8 | -3.7 | 3.9 | 11.9 | 16.2 | 18.5 | 19.5 | 15.3 | 6.9 | 1.1 | -2.6 |
| Absolute minimum temperature (°C) | -22.8 | -20.2 | -10.1 | -5.8 | 2.0 | 9.3 | 12.2 | 14.1 | 9.8 | -8.7 | -6.9 | -6.7 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 5.7 | 8.1 | 8.9 | 11.1 | 11.0 | 12.3 | 11.8 | 11.7 | 10.5 | 8.0 | 7.1 | 4.9 |
| Precipitation (mm) | 65 | 28 | 27 | 9 | 70 | 104 | 101 | 35 | 67 | 43 | 16 | 28 |
| Sunny days | 19 | 18 | 21 | 24 | 12 | 13 | 12 | 20 | 21 | 18 | 23 | 22 |
| Rainy days | 3 | 3 | 7 | 5 | 19 | 17 | 19 | 11 | 9 | 11 | 6 | 8 |
| Snow days | 9 | 7 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 |
The best time to visit Sumner during the most sunny months:
The largest precipitation sum in Sumner is at