Climate almanac
DeKalb
Illinois, United States · 41.93°, -88.75°
What is the weather like in DeKalb in October?
In October, DeKalb is typically 64°F (18°C) during the day and 46°F (8°C) at night. The month brings about 3.6 in (92 mm) of precipitation in total. Snowfall averages about 0.7 in (18 mm) over the month.
- Average high64°F (18°C)
- Average low46°F (8°C)
- Precipitation3.6 in (92 mm)
- Clear or mostly clear days11
- Snowfall0.7 in (18 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)