January weather in Harrisburg, IL
The average temperature in Harrisburg in January is 33.4°F (24.0°F–42.9°F). Average precipitation: 3.79 inches.
January is a winter month in Harrisburg, and is cooler than the annual average of 57.3°F. Daily temperatures swing about 18.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 40m. For travel, January is cold.
Avg High
42.9°F
Avg Low
24.0°F
Precipitation
3.79 in
Daylight
9h 40m
January records in Harrisburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 70.0°F (1952) | -2.9°F (1928) | 2.80 in (1966) |
| January 2 | 66.9°F (2000) | -0.9°F (1928) | 2.08 in (1907) |
| January 3 | 72.0°F (2000) | -2.0°F (1928) | 2.58 in (2000) |
| January 4 | 66.9°F (1997) | 0.0°F (1911) | 2.88 in (1950) |
| January 5 | 68.0°F (1955) | -9.0°F (1940) | 2.32 in (1993) |
| January 6 | 66.9°F (2008) | -2.0°F (1924) | 2.00 in (2007) |
| January 7 | 69.1°F (2008) | -18.0°F (1912) | 3.00 in (2007) |
| January 8 | 69.1°F (1965) | -11.0°F (1942) | 1.76 in (1920) |
| January 9 | 68.0°F (1902) | -5.1°F (1979) | 2.00 in (2008) |
| January 10 | 64.9°F (1975) | -13.0°F (1982) | 1.25 in (1975) |
| January 11 | 68.0°F (1911) | -18.0°F (1977) | 2.30 in (1913) |
| January 12 | 72.0°F (1916) | -18.0°F (1918) | 2.88 in (1950) |
| January 13 | 68.0°F (1911) | -20.0°F (1912) | 1.95 in (1950) |
| January 14 | 70.0°F (1932) | -9.0°F (1964) | 3.84 in (1937) |
| January 15 | 73.0°F (1907) | -9.9°F (1979) | 1.39 in (1962) |
| January 16 | 73.9°F (1928) | -9.0°F (1912) | 1.10 in (1994) |
| January 17 | 69.1°F (1952) | -22.0°F (1977) | 1.67 in (1969) |
| January 18 | 68.0°F (1923) | -18.9°F (1994) | 1.74 in (1929) |
| January 19 | 73.0°F (1907) | -15.0°F (1994) | 1.90 in (2023) |
| January 20 | 75.0°F (1906) | -11.0°F (1994) | 2.00 in (1954) |
| January 21 | 71.1°F (1986) | -17.0°F (1984) | 2.80 in (1959) |
| January 22 | 68.0°F (1964) | -7.1°F (1930) | 2.42 in (1999) |
| January 23 | 73.9°F (1909) | -11.0°F (1918) | 1.07 in (1982) |
| January 24 | 78.1°F (1943) | -15.0°F (1963) | 2.31 in (1929) |
| January 25 | 75.9°F (1950) | -5.1°F (1905) | 1.20 in (2023) |
| January 26 | 73.9°F (1950) | -7.1°F (1940) | 2.00 in (1950) |
| January 27 | 70.0°F (1947) | -13.0°F (1904) | 0.96 in (1949) |
| January 28 | 71.1°F (1970) | -17.0°F (1963) | 2.12 in (1916) |
| January 29 | 71.1°F (2002) | -4.0°F (1977) | 2.37 in (1939) |
| January 30 | 72.0°F (1931) | -6.0°F (1966) | 3.55 in (1982) |
| January 31 | 70.0°F (1917) | -7.1°F (1965) | 3.33 in (1982) |