Climate almanac
Eureka
Illinois, United States · 40.72°, -89.27°
What is the weather like in Eureka in May?
In May, Eureka is typically 74°F (24°C) during the day and 55°F (13°C) at night. The month brings about 5.0 in (128 mm) of precipitation in total.
- Average high74°F (24°C)
- Average low55°F (13°C)
- Precipitation5.0 in (128 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)