Average annual temperature is 21.3 °C
Absolute maximum temperature: 40.9 °C
Absolute minimum temperature: 1.6 °C
Number of sunny days: 175 days
Number of rainy days: 190 days
Look at detailed online map of Onalaska
* Weather data for Onalaska 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) | 23.8 | 26.8 | 28.7 | 31.0 | 31.4 | 37.7 | 37.8 | 40.9 | 37.7 | 35.0 | 28.1 | 25.4 |
| Average daytime temperature (°C) | 17.5 | 19.2 | 23.1 | 23.9 | 28.1 | 33.7 | 35.6 | 37.5 | 33.4 | 26.7 | 19.8 | 18.0 |
| Average temperature (°C) | 13.0 | 14.0 | 18.0 | 19.0 | 23.6 | 28.1 | 30.5 | 31.6 | 28.0 | 21.4 | 15.3 | 12.8 |
| Average night temperature (°C) | 9.7 | 10.4 | 14.3 | 15.4 | 20.0 | 24.1 | 26.4 | 26.7 | 23.8 | 17.8 | 11.9 | 8.9 |
| Absolute minimum temperature (°C) | 2.1 | 1.6 | 4.3 | 10.8 | 14.6 | 20.9 | 24.3 | 23.2 | 18.7 | 7.9 | 4.2 | 2.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| 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) | 6.2 | 6.9 | 7.5 | 7.7 | 9.1 | 11.0 | 12.5 | 12.2 | 10.8 | 8.7 | 6.3 | 7.9 |
| Precipitation (mm) | 229 | 87 | 133 | 233 | 125 | 106 | 23 | 13 | 28 | 142 | 70 | 62 |
| Sunny days | 15 | 13 | 11 | 11 | 13 | 7 | 18 | 21 | 13 | 17 | 17 | 19 |
| Rainy days | 16 | 15 | 20 | 19 | 18 | 23 | 13 | 10 | 17 | 14 | 13 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Onalaska during the most sunny months:
The largest precipitation sum in Onalaska is at