Last updated: March 2, 2024
The weather in St. Charles, United States, during April is characterized by an average temperature of 14°C (58°F). Highs can soar to 28°C (83°F), while lows may dip to 3°C (37°F). Typically, the humidity level in St. Charles throughout April hovers around 81%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, St. Charles averages 99 mm (3.9 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 13 minutes of daylight, with the sun shining for approximately 9 hours 3 minutes each day. Additionally, there is a 49% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In April, the UV Index in St. Charles reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 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 | 8 | 9 | 8 | 7 | 5 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||