Climate almanac
DeKalb
Illinois, United States · 41.93°, -88.75°
What is the weather like in DeKalb in July?
In July, DeKalb is typically 83°F (28°C) during the day and 66°F (19°C) at night. The month brings about 4.1 in (103 mm) of precipitation in total.
- Average high83°F (28°C)
- Average low66°F (19°C)
- Precipitation4.1 in (103 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)