Climate almanac
Harrisburg
Illinois, United States · 37.74°, -88.54°
What is the weather like in Harrisburg in April?
In April, Harrisburg is typically 70°F (21°C) during the day and 49°F (10°C) at night. The month brings about 5.5 in (140 mm) of precipitation in total.
- Average high70°F (21°C)
- Average low49°F (10°C)
- Precipitation5.5 in (140 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)