Climate almanac
Quincy
Illinois, United States · 39.94°, -91.41°
What is the weather like in Quincy in August?
In August, Quincy is typically 85°F (29°C) during the day and 67°F (19°C) at night. The month brings about 3.4 in (86 mm) of precipitation in total.
- Average high85°F (29°C)
- Average low67°F (19°C)
- Precipitation3.4 in (86 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)