Last updated: March 2, 2024
The weather in Onalaska, United States, during April is characterized by an average temperature of 20°C (68°F). Highs can soar to 29°C (85°F), while lows may dip to 8°C (47°F). Typically, the humidity level in Onalaska throughout April hovers around 79%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, Onalaska averages 115 mm (4.5 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 56 minutes of daylight, with the sun shining for approximately 8 hours 24 minutes each day. Additionally, there is a 38% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In April, the UV Index in Onalaska reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 3 | 5 | 7 | 9 | 11 | 10 | 8 | 6 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||