Average annual temperature is 10.0 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -22.0 °C
Number of sunny days: 164 days
Number of rainy days: 167 days
Number of snow days: 34 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) | 7.0 | 11.8 | 14.2 | 26.4 | 32.7 | 34.9 | 32.7 | 32.2 | 31.6 | 28.4 | 16.1 | 13.1 |
| Average daytime temperature (°C) | 2.1 | 3.3 | 5.9 | 15.1 | 22.0 | 27.3 | 27.2 | 25.5 | 22.7 | 15.7 | 7.9 | 5.8 |
| Average temperature (°C) | -1.0 | -1.7 | 1.0 | 8.7 | 14.8 | 20.4 | 21.7 | 19.7 | 17.5 | 11.3 | 3.5 | 2.8 |
| Average night temperature (°C) | -3.4 | -5.8 | -2.9 | 3.3 | 8.3 | 14.0 | 16.6 | 15.1 | 13.1 | 8.0 | 0.0 | 0.6 |
| Absolute minimum temperature (°C) | -22.0 | -17.3 | -8.7 | -4.5 | 1.3 | 8.0 | 11.4 | 8.7 | 6.4 | -2.1 | -8.2 | -5.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.9 | 6.1 | 6.6 | 8.7 | 10.2 | 11.8 | 11.9 | 10.4 | 8.1 | 5.9 | 6.0 | 3.4 |
| Precipitation (mm) | 59 | 99 | 84 | 79 | 17 | 67 | 127 | 160 | 24 | 93 | 50 | 56 |
| Sunny days | 8 | 14 | 9 | 14 | 23 | 18 | 8 | 15 | 14 | 8 | 18 | 15 |
| Rainy days | 13 | 9 | 10 | 15 | 8 | 12 | 23 | 16 | 16 | 22 | 8 | 15 |
| Snow days | 10 | 5 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 1 |
The best time to visit Sumner during the most sunny months:
Months with the longest average daylight duration in Sumner:
The largest precipitation sum in Sumner is at