Average annual temperature is 18.5 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 189 days
Number of rainy days: 176 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) | 23.0 | 25.9 | 26.2 | 28.8 | 30.9 | 35.9 | 35.8 | 37.4 | 32.8 | 31.9 | 27.7 | 21.9 |
| Average daytime temperature (°C) | 14.8 | 17.1 | 19.2 | 22.4 | 27.4 | 31.3 | 32.3 | 33.0 | 30.0 | 25.6 | 18.4 | 15.1 |
| Average temperature (°C) | 10.2 | 11.4 | 13.6 | 16.5 | 21.9 | 25.7 | 27.4 | 27.8 | 24.5 | 19.7 | 12.9 | 9.5 |
| Average night temperature (°C) | 6.5 | 7.4 | 9.1 | 11.9 | 16.8 | 20.8 | 23.2 | 23.6 | 19.7 | 15.1 | 8.3 | 5.3 |
| Absolute minimum temperature (°C) | -2.4 | -2.9 | -3.8 | 6.5 | 8.9 | 17.2 | 19.1 | 18.2 | 15.2 | 3.8 | 0.1 | -1.4 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 5.8 | 6.3 | 7.9 | 8.2 | 11.3 | 12.2 | 11.5 | 11.0 | 10.8 | 8.4 | 6.7 | 7.1 |
| Precipitation (mm) | 172 | 128 | 126 | 175 | 66 | 102 | 98 | 119 | 32 | 38 | 31 | 79 |
| Sunny days | 15 | 11 | 15 | 12 | 13 | 14 | 13 | 15 | 17 | 25 | 19 | 20 |
| Rainy days | 16 | 17 | 16 | 18 | 18 | 16 | 18 | 16 | 13 | 6 | 11 | 11 |
| 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