Climate almanac
Marion
Illinois, United States · 37.73°, -88.93°
What is the weather like in Marion in August?
In August, Marion is typically 86°F (30°C) during the day and 69°F (21°C) at night. The month brings about 4.1 in (104 mm) of precipitation in total.
- Average high86°F (30°C)
- Average low69°F (21°C)
- Precipitation4.1 in (104 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)