Climate almanac
Mount Vernon
Illinois, United States · 38.32°, -88.90°
What is the weather like in Mount Vernon in January?
In January, Mount Vernon is typically 42°F (5°C) during the day and 28°F (-2°C) at night. The month brings about 3.8 in (97 mm) of precipitation in total. Snowfall averages about 3.4 in (86 mm) over the month.
- Average high42°F (5°C)
- Average low28°F (-2°C)
- Precipitation3.8 in (97 mm)
- Clear or mostly clear days8
- Snowfall3.4 in (86 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)