Climate almanac
Chester
Illinois, United States · 37.91°, -89.82°
What is the weather like in Chester in May?
In May, Chester is typically 78°F (25°C) during the day and 60°F (15°C) at night. The month brings about 5.3 in (135 mm) of precipitation in total.
- Average high78°F (25°C)
- Average low60°F (15°C)
- Precipitation5.3 in (135 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)