April Weather in St. Charles

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%.

3°C (37°F)

Minimum temperature

14°C (58°F)

Average temperature

28°C (83°F)

Maximum temperature

81%

Humidity

Precipitation and Sunshine hours

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.

99 mm (3.9 inches)

Precipitation

11 rainy days

Rainy days

9 hours 3 minutes

Sunshine hours

49%

Chance of sun

UV Index

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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  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

Compare St. Charles's Climate with Cities Worldwide