Average annual temperature is 20.1 °C
Absolute maximum temperature: 37.8 °C
Absolute minimum temperature: -1.6 °C
Number of sunny days: 172 days
Number of rainy days: 193 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) | 24.6 | 28.2 | 30.9 | 32.2 | 33.0 | 35.0 | 37.2 | 37.8 | 32.5 | 30.1 | 26.1 | 24.1 |
| Average daytime temperature (°C) | 18.5 | 21.6 | 23.4 | 26.9 | 28.2 | 31.2 | 34.4 | 35.0 | 29.8 | 24.9 | 19.4 | 16.2 |
| Average temperature (°C) | 12.7 | 15.8 | 17.1 | 20.2 | 22.3 | 25.6 | 28.4 | 29.1 | 24.4 | 19.4 | 14.4 | 11.3 |
| Average night temperature (°C) | 8.1 | 11.4 | 11.8 | 14.7 | 17.3 | 21.0 | 23.8 | 24.3 | 20.1 | 14.6 | 10.4 | 7.5 |
| Absolute minimum temperature (°C) | -1.6 | 0.2 | -0.2 | 8.6 | 10.4 | 18.0 | 21.6 | 22.5 | 16.1 | 8.4 | 0.1 | -0.2 |
| 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) | 10.4 | 11.1 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.6 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.9 | 7.9 | 8.8 | 9.3 | 10.5 | 10.6 | 11.4 | 11.2 | 10.1 | 9.0 | 6.7 | 6.6 |
| Precipitation (mm) | 157 | 117 | 81 | 67 | 61 | 165 | 128 | 116 | 56 | 72 | 59 | 171 |
| Sunny days | 16 | 13 | 14 | 11 | 12 | 9 | 4 | 11 | 16 | 25 | 20 | 21 |
| Rainy days | 15 | 15 | 17 | 19 | 19 | 21 | 27 | 20 | 14 | 6 | 10 | 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