January weather in Wilmington, IL
The average temperature in Wilmington in January is 26.9°F (18.4°F–35.4°F). Average precipitation: 2.06 inches. Average snowfall is 6.3 inches.
January is a winter month in Wilmington, and is cooler than the annual average of 52.9°F. Daily temperatures swing about 17°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 30m. For travel, January is cold.
Avg High
35.4°F
Avg Low
18.4°F
Precipitation
2.06 in
Snow
6.3 in
January records in Wilmington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 66.0°F (1905) | -14.1°F (1974) | 1.39 in (1948) |
| January 2 | 64.9°F (2005) | -14.1°F (1928) | 1.56 in (1897) |
| January 3 | 66.9°F (2004) | -9.9°F (1928) | 1.17 in (1950) |
| January 4 | 66.9°F (2023) | -8.0°F (1974) | 1.88 in (1993) |
| January 5 | 66.9°F (1997) | -17.0°F (1999) | 1.21 in (2005) |
| January 6 | 71.1°F (1907) | -15.0°F (1999) | 0.86 in (2005) |
| January 7 | 71.1°F (1965) | -26.0°F (1912) | 1.52 in (1937) |
| January 8 | 70.0°F (1965) | -11.0°F (1970) | 2.30 in (2008) |
| January 9 | 64.9°F (2006) | -5.1°F (1945) | 1.08 in (1898) |
| January 10 | 61.0°F (1911) | -20.0°F (1982) | 1.90 in (1975) |
| January 11 | 69.1°F (1911) | -16.1°F (1977) | 2.00 in (1905) |
| January 12 | 64.9°F (1936) | -22.0°F (1918) | 1.20 in (1916) |
| January 13 | 66.0°F (2005) | -20.0°F (1912) | 2.32 in (1911) |
| January 14 | 73.0°F (1928) | -11.9°F (2024) | 1.88 in (1995) |
| January 15 | 66.0°F (1949) | -22.0°F (1927) | 0.75 in (1907) |
| January 16 | 63.0°F (1933) | -17.0°F (1977) | 1.25 in (1907) |
| January 17 | 71.1°F (1990) | -18.0°F (1977) | 0.50 in (2012) |
| January 18 | 64.0°F (1951) | -24.0°F (1930) | 1.56 in (2020) |
| January 19 | 71.1°F (1952) | -15.0°F (1940) | 1.50 in (1907) |
| January 20 | 73.0°F (1906) | -18.9°F (1985) | 1.38 in (1898) |
| January 21 | 69.1°F (1906) | -20.9°F (1924) | 1.30 in (1904) |
| January 22 | 69.1°F (1967) | -20.0°F (1930) | 0.83 in (1965) |
| January 23 | 77.0°F (1909) | -17.0°F (1963) | 1.20 in (2024) |
| January 24 | 73.9°F (1950) | -22.0°F (1915) | 1.13 in (1938) |
| January 25 | 73.9°F (1950) | -11.9°F (1987) | 0.63 in (1898) |
| January 26 | 68.0°F (1911) | -16.1°F (1936) | 1.68 in (1967) |
| January 27 | 68.0°F (1914) | -17.0°F (1936) | 0.87 in (1949) |
| January 28 | 68.0°F (1970) | -17.0°F (1963) | 1.39 in (1909) |
| January 29 | 68.0°F (2013) | -11.9°F (1966) | 1.04 in (1909) |
| January 30 | 66.9°F (2008) | -18.0°F (1936) | 2.10 in (2013) |
| January 31 | 62.1°F (2012) | -15.0°F (2004) | 1.37 in (1914) |