Climate almanac
Waterloo
Illinois, United States · 38.34°, -90.15°
What is the weather like in Waterloo in October?
In October, Waterloo is typically 71°F (22°C) during the day and 51°F (10°C) at night. The month brings about 3.4 in (87 mm) of precipitation in total.
- Average high71°F (22°C)
- Average low51°F (10°C)
- Precipitation3.4 in (87 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)