Climate almanac
Marion
Illinois, United States · 37.73°, -88.93°
What is the weather like in Marion in May?
In May, Marion is typically 78°F (25°C) during the day and 61°F (16°C) at night. The month brings about 5.1 in (130 mm) of precipitation in total.
- Average high78°F (25°C)
- Average low61°F (16°C)
- Precipitation5.1 in (130 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)