Average annual temperature is 18.6 °C
Absolute maximum temperature: 40.4 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 209 days
Number of rainy days: 156 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) | 22.2 | 24.8 | 26.3 | 28.6 | 30.6 | 36.5 | 37.2 | 40.4 | 39.0 | 31.6 | 27.0 | 22.6 |
| Average daytime temperature (°C) | 14.1 | 15.8 | 19.5 | 22.0 | 27.6 | 32.5 | 34.1 | 36.6 | 31.9 | 24.3 | 17.9 | 14.3 |
| Average temperature (°C) | 9.3 | 9.7 | 13.7 | 16.3 | 21.8 | 26.3 | 28.6 | 30.4 | 26.0 | 18.9 | 12.5 | 9.0 |
| Average night temperature (°C) | 5.4 | 5.6 | 9.4 | 11.6 | 17.0 | 21.3 | 24.2 | 25.0 | 21.0 | 14.6 | 8.1 | 4.9 |
| Absolute minimum temperature (°C) | -4.9 | -4.9 | -1.9 | 6.2 | 8.2 | 18.0 | 20.9 | 18.7 | 17.4 | -0.3 | -2.3 | -1.7 |
| 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 | 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 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| 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) | 6.1 | 6.2 | 7.8 | 8.7 | 9.8 | 11.6 | 11.5 | 12.1 | 10.6 | 7.6 | 7.8 | 7.2 |
| Precipitation (mm) | 70 | 165 | 249 | 134 | 91 | 92 | 75 | 12 | 55 | 202 | 105 | 71 |
| Sunny days | 20 | 13 | 14 | 16 | 12 | 12 | 18 | 24 | 17 | 19 | 23 | 21 |
| Rainy days | 11 | 15 | 17 | 14 | 19 | 18 | 13 | 7 | 13 | 12 | 7 | 10 |
| 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