Climate almanac
Monmouth
Illinois, United States · 40.91°, -90.65°
What is the weather like in Monmouth in January?
In January, Monmouth is typically 33°F (1°C) during the day and 20°F (-7°C) at night. The month brings about 2.2 in (56 mm) of precipitation in total. Snowfall averages about 7.2 in (183 mm) over the month.
- Average high33°F (1°C)
- Average low20°F (-7°C)
- Precipitation2.2 in (56 mm)
- Clear or mostly clear days7
- Snowfall7.2 in (183 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)