January weather in Harristown, IL
The average temperature in Harristown in January is 26.9°F (19.7°F–34.0°F). Average precipitation: 2.40 inches. Average snowfall is 5.9 inches.
January is a winter month in Harristown, and is cooler than the annual average of 53°F. Daily temperatures swing about 14.3°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 28m. For travel, January is cold.
Avg High
34.0°F
Avg Low
19.7°F
Precipitation
2.40 in
Snow
5.9 in
January records in Harristown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 62.1°F (1952) | -14.1°F (2018) | 1.31 in (1965) |
| January 2 | 64.0°F (2004) | -13.0°F (1928) | 1.01 in (1951) |
| January 3 | 62.1°F (2004) | -31.0°F (1999) | 2.25 in (1950) |
| January 4 | 57.9°F (1939) | -7.1°F (1919) | 1.65 in (2004) |
| January 5 | 59.0°F (1955) | -18.0°F (1924) | 1.59 in (1955) |
| January 6 | 64.0°F (2008) | -13.0°F (2014) | 0.83 in (1918) |
| January 7 | 66.9°F (2008) | -22.0°F (1912) | 2.12 in (1937) |
| January 8 | 66.9°F (1907) | -11.9°F (1970) | 1.60 in (2008) |
| January 9 | 61.0°F (2026) | -7.1°F (1962) | 1.10 in (1901) |
| January 10 | 60.1°F (1939) | -20.0°F (1982) | 1.36 in (1975) |
| January 11 | 60.1°F (2017) | -18.9°F (1999) | 1.83 in (2020) |
| January 12 | 64.9°F (2005) | -20.9°F (1918) | 1.60 in (1916) |
| January 13 | 63.0°F (2005) | -16.1°F (1912) | 1.97 in (2005) |
| January 14 | 66.9°F (1928) | -11.9°F (1957) | 1.46 in (1995) |
| January 15 | 66.9°F (1949) | -22.0°F (1927) | 1.00 in (1907) |
| January 16 | 66.0°F (1990) | -20.9°F (1977) | 1.01 in (1907) |
| January 17 | 69.1°F (1952) | -23.1°F (1977) | 0.68 in (1907) |
| January 18 | 61.0°F (1951) | -20.9°F (1930) | 1.43 in (1949) |
| January 19 | 64.0°F (1951) | -14.1°F (1940) | 2.10 in (1907) |
| January 20 | 64.9°F (1907) | -22.0°F (1985) | 1.41 in (1898) |
| January 21 | 69.1°F (1906) | -18.9°F (1984) | 1.15 in (1906) |
| January 22 | 63.0°F (1967) | -16.1°F (1930) | 1.17 in (1929) |
| January 23 | 68.0°F (1967) | -18.9°F (1936) | 0.90 in (1949) |
| January 24 | 73.0°F (1909) | -17.0°F (1915) | 1.14 in (1928) |
| January 25 | 71.1°F (1950) | -22.0°F (1894) | 0.94 in (2024) |
| January 26 | 60.1°F (1916) | -11.0°F (1936) | 1.77 in (1967) |
| January 27 | 63.0°F (1999) | -14.1°F (1904) | 0.66 in (1949) |
| January 28 | 66.0°F (1970) | -14.1°F (1915) | 1.14 in (1997) |
| January 29 | 68.0°F (2013) | -11.9°F (1899) | 1.14 in (2013) |
| January 30 | 59.0°F (1931) | -16.1°F (2019) | 2.12 in (1982) |
| January 31 | 66.9°F (1989) | -13.0°F (1996) | 1.65 in (2002) |