Climate almanac
Waterloo
Illinois, United States · 38.34°, -90.15°
What is the weather like in Waterloo in January?
In January, Waterloo is typically 42°F (5°C) during the day and 27°F (-3°C) at night. The month brings about 3.2 in (81 mm) of precipitation in total. Snowfall averages about 4.2 in (106 mm) over the month.
- Average high42°F (5°C)
- Average low27°F (-3°C)
- Precipitation3.2 in (81 mm)
- Clear or mostly clear days9
- Snowfall4.2 in (106 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)