Average annual temperature is 11.4 °C
Absolute maximum temperature: 34.8 °C
Absolute minimum temperature: -9.1 °C
Number of sunny days: 181 days
Number of rainy days: 184 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) | 14.6 | 14.9 | 18.9 | 23.4 | 34.8 | 22.1 | 25.6 | 33.9 | 32.1 | 29.5 | 20.8 | 19.4 |
| Average daytime temperature (°C) | 11.5 | 10.5 | 10.7 | 13.2 | 17.8 | 18.8 | 22.3 | 24.7 | 21.7 | 19.3 | 15.5 | 14.0 |
| Average temperature (°C) | 6.9 | 5.1 | 5.5 | 8.6 | 12.8 | 13.8 | 16.5 | 18.3 | 15.7 | 13.3 | 9.8 | 10.0 |
| Average night temperature (°C) | 3.9 | 1.3 | 1.9 | 5.3 | 8.9 | 9.6 | 12.0 | 13.7 | 11.3 | 9.6 | 6.2 | 7.5 |
| Absolute minimum temperature (°C) | -3.6 | -4.7 | -9.1 | -2.0 | 3.1 | 5.1 | 8.4 | 10.1 | 7.7 | 2.1 | -0.4 | 1.4 |
| 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) | 4.2 | 6.2 | 6.5 | 7.2 | 10.7 | 12.1 | 12.7 | 12.0 | 9.5 | 7.8 | 5.2 | 3.2 |
| Precipitation (mm) | 217 | 183 | 290 | 245 | 47 | 29 | 1 | 9 | 85 | 89 | 164 | 330 |
| Sunny days | 7 | 10 | 4 | 10 | 17 | 21 | 27 | 27 | 21 | 15 | 12 | 10 |
| Rainy days | 24 | 18 | 27 | 20 | 14 | 9 | 4 | 4 | 9 | 16 | 18 | 21 |
| 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:
Months with the longest average daylight duration in Sumner:
The largest precipitation sum in Sumner is at