January weather in Monmouth, IL
The average temperature in Monmouth in January is 23.1°F (14.7°F–31.4°F). Average precipitation: 1.85 inches. Average snowfall is 8.7 inches.
January is a winter month in Monmouth, and is cooler than the annual average of 50.6°F. Daily temperatures swing about 16.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 22m. For travel, January is cold.
Avg High
31.4°F
Avg Low
14.7°F
Precipitation
1.85 in
Snow
8.7 in
January records in Monmouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 63.0°F (1897) | -18.9°F (2018) | 1.57 in (1965) |
| January 2 | 64.0°F (2004) | -17.0°F (2018) | 1.89 in (1897) |
| January 3 | 64.0°F (2004) | -18.0°F (1919) | 1.40 in (1971) |
| January 4 | 63.0°F (2023) | -18.9°F (1919) | 0.92 in (1998) |
| January 5 | 55.9°F (1956) | -25.1°F (1999) | 1.62 in (1955) |
| January 6 | 62.1°F (2008) | -18.9°F (2014) | 0.79 in (1918) |
| January 7 | 64.0°F (2008) | -18.9°F (1912) | 0.55 in (2010) |
| January 8 | 62.1°F (2003) | -17.0°F (2015) | 1.10 in (1935) |
| January 9 | 62.1°F (2003) | -11.9°F (1999) | 1.10 in (1946) |
| January 10 | 57.9°F (2020) | -24.0°F (1982) | 0.49 in (1901) |
| January 11 | 55.0°F (2012) | -14.1°F (1918) | 1.34 in (2020) |
| January 12 | 59.0°F (1960) | -22.0°F (1912) | 1.26 in (1960) |
| January 13 | 59.0°F (1961) | -20.0°F (1916) | 1.29 in (1979) |
| January 14 | 61.0°F (1928) | -18.9°F (1916) | 1.85 in (1940) |
| January 15 | 59.0°F (1952) | -23.1°F (2009) | 1.10 in (1969) |
| January 16 | 60.1°F (1990) | -20.0°F (1977) | 0.62 in (1907) |
| January 17 | 64.0°F (1894) | -17.0°F (1977) | 1.30 in (2017) |
| January 18 | 59.0°F (1894) | -20.0°F (1930) | 1.93 in (1996) |
| January 19 | 62.1°F (1952) | -20.0°F (1994) | 1.91 in (1907) |
| January 20 | 63.0°F (1906) | -25.1°F (1985) | 1.79 in (1904) |
| January 21 | 66.0°F (1957) | -20.0°F (1970) | 0.85 in (1916) |
| January 22 | 61.0°F (1964) | -18.0°F (1930) | 1.45 in (1929) |
| January 23 | 68.0°F (1909) | -20.9°F (1936) | 1.11 in (1965) |
| January 24 | 68.0°F (1950) | -15.0°F (1894) | 2.30 in (1938) |
| January 25 | 62.1°F (1950) | -20.0°F (1894) | 0.79 in (1898) |
| January 26 | 59.0°F (2002) | -16.1°F (2019) | 1.10 in (1895) |
| January 27 | 64.0°F (1944) | -16.1°F (1902) | 1.10 in (1916) |
| January 28 | 57.0°F (1914) | -20.0°F (1915) | 1.35 in (2006) |
| January 29 | 59.0°F (2013) | -18.0°F (1966) | 1.63 in (2001) |
| January 30 | 61.0°F (2013) | -22.0°F (2019) | 1.25 in (2013) |
| January 31 | 69.1°F (1989) | -24.0°F (2019) | 0.98 in (2021) |