Average annual temperature is 16.8 °C
Absolute maximum temperature: 40.4 °C
Absolute minimum temperature: -9.9 °C
Number of sunny days: 224 days
Number of rainy days: 141 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) | 20.1 | 22.1 | 27.0 | 32.1 | 33.9 | 38.9 | 38.3 | 40.4 | 38.3 | 32.5 | 26.3 | 18.5 |
| Average daytime temperature (°C) | 11.3 | 12.8 | 16.9 | 23.4 | 26.7 | 31.6 | 34.3 | 34.9 | 31.5 | 23.4 | 16.3 | 12.4 |
| Average temperature (°C) | 5.2 | 6.0 | 10.1 | 15.9 | 20.7 | 25.5 | 28.3 | 28.8 | 25.2 | 17.8 | 10.6 | 7.3 |
| Average night temperature (°C) | 0.8 | 1.1 | 5.1 | 9.8 | 15.7 | 20.3 | 23.3 | 23.6 | 20.0 | 13.0 | 5.9 | 3.5 |
| Absolute minimum temperature (°C) | -9.9 | -7.3 | -6.1 | 2.8 | 5.6 | 16.4 | 18.5 | 17.1 | 15.5 | -0.6 | -4.2 | -3.6 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.7 | 7.3 | 8.5 | 9.8 | 10.0 | 11.2 | 11.8 | 12.1 | 10.4 | 8.5 | 7.3 | 6.8 |
| Precipitation (mm) | 45 | 37 | 36 | 68 | 89 | 100 | 91 | 31 | 73 | 76 | 44 | 50 |
| Sunny days | 22 | 18 | 17 | 16 | 12 | 13 | 17 | 19 | 22 | 20 | 25 | 23 |
| Rainy days | 9 | 10 | 14 | 14 | 19 | 17 | 14 | 12 | 8 | 11 | 5 | 8 |
| Snow days | 0 | 0 | 0 | 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