Climate almanac
Vandalia
Illinois, United States · 38.96°, -89.09°
What is the weather like in Vandalia in October?
In October, Vandalia is typically 70°F (21°C) during the day and 49°F (10°C) at night. The month brings about 3.5 in (89 mm) of precipitation in total.
- Average high70°F (21°C)
- Average low49°F (10°C)
- Precipitation3.5 in (89 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)