January weather in Sumner, IL
The average temperature in Sumner in January is 30.2°F (21.3°F–39.1°F). Average precipitation: 3.26 inches. Average snowfall is 3.8 inches.
January is a winter month in Sumner, and is cooler than the annual average of 54.9°F. Daily temperatures swing about 17.8°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 35m. For travel, January is cold.
Avg High
39.1°F
Avg Low
21.3°F
Precipitation
3.26 in
Snow
3.8 in
January records in Sumner
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 62.1°F (2007) | -7.1°F (2018) | 1.49 in (1979) |
| January 2 | 61.0°F (2006) | -8.0°F (2018) | 1.15 in (1999) |
| January 3 | 66.9°F (2006) | -7.1°F (2018) | 0.72 in (2023) |
| January 4 | 66.0°F (1997) | -2.9°F (2018) | 1.76 in (1971) |
| January 5 | 66.9°F (1997) | -4.0°F (1999) | 1.50 in (1993) |
| January 6 | 59.0°F (1998) | -8.0°F (2018) | 0.73 in (1989) |
| January 7 | 64.9°F (2008) | -6.0°F (2018) | 0.67 in (1995) |
| January 8 | 66.9°F (2008) | -2.9°F (2017) | 0.89 in (1998) |
| January 9 | 68.0°F (2026) | -0.9°F (2025) | 1.59 in (2008) |
| January 10 | 63.0°F (2026) | -2.0°F (1999) | 1.05 in (2020) |
| January 11 | 57.9°F (2013) | -6.0°F (1997) | 2.42 in (2020) |
| January 12 | 64.0°F (2017) | -6.0°F (1997) | 0.91 in (2018) |
| January 13 | 66.0°F (1995) | -6.0°F (1997) | 2.38 in (2013) |
| January 14 | 64.0°F (1995) | -5.1°F (1997) | 0.88 in (2017) |
| January 15 | 57.9°F (2007) | -6.0°F (2025) | 1.35 in (2007) |
| January 16 | 52.0°F (2000) | -7.1°F (1994) | 1.19 in (1997) |
| January 17 | 62.1°F (2012) | -8.0°F (2018) | 0.95 in (1994) |
| January 18 | 60.1°F (2012) | -13.0°F (1994) | 1.62 in (2020) |
| January 19 | 55.9°F (2023) | -18.9°F (1994) | 1.51 in (2023) |
| January 20 | 63.0°F (2006) | -13.0°F (1994) | 1.34 in (2017) |
| January 21 | 66.9°F (2017) | -7.1°F (1994) | 1.22 in (1993) |
| January 22 | 63.0°F (1964) | -6.0°F (1994) | 2.48 in (1999) |
| January 23 | 64.9°F (1964) | 1.9°F (2003) | 1.72 in (1982) |
| January 24 | 62.1°F (2002) | -0.9°F (2003) | 0.97 in (2024) |
| January 25 | 59.0°F (1964) | 1.0°F (2003) | 0.72 in (2026) |
| January 26 | 51.1°F (2018) | -2.0°F (2026) | 0.73 in (2012) |
| January 27 | 55.9°F (2018) | -4.0°F (2026) | 0.43 in (1967) |
| January 28 | 64.0°F (1999) | -11.0°F (2026) | 1.54 in (1994) |
| January 29 | 66.9°F (2002) | 1.9°F (2022) | 1.20 in (1970) |
| January 30 | 66.0°F (2002) | 0.0°F (2026) | 2.13 in (1969) |
| January 31 | 61.0°F (2002) | -11.0°F (2004) | 2.56 in (1982) |