Climate almanac
St. Charles
Illinois, United States · 41.91°, -88.31°
What is the weather like in St. Charles in May?
In May, St. Charles is typically 72°F (22°C) during the day and 52°F (11°C) at night. The month brings about 5.2 in (132 mm) of precipitation in total.
- Average high72°F (22°C)
- Average low52°F (11°C)
- Precipitation5.2 in (132 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)