Climate almanac
Mount Vernon
Illinois, United States · 38.32°, -88.90°
What is the weather like in Mount Vernon in October?
In October, Mount Vernon is typically 71°F (22°C) during the day and 51°F (11°C) at night. The month brings about 3.7 in (95 mm) of precipitation in total.
- Average high71°F (22°C)
- Average low51°F (11°C)
- Precipitation3.7 in (95 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)