Climate almanac
Waterloo
Illinois, United States · 38.34°, -90.15°
What is the weather like in Waterloo in July?
In July, Waterloo is typically 89°F (32°C) during the day and 72°F (22°C) at night. The month brings about 4.2 in (107 mm) of precipitation in total.
- Average high89°F (32°C)
- Average low72°F (22°C)
- Precipitation4.2 in (107 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)