December weather in Salem, IL
The average temperature in Salem in December is 34.2°F (25.6°F–42.8°F). Average precipitation: 2.93 inches. Average snowfall is 2.9 inches.
December is a winter month in Salem, and is cooler than the annual average of 54.9°F. Daily temperatures swing about 17.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 19m. For travel, December is cold.
Avg High
42.8°F
Avg Low
25.6°F
Precipitation
2.93 in
Snow
2.9 in
December records in Salem
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (1970) | 5.0°F (1964) | 1.11 in (2006) |
| December 2 | 73.9°F (1982) | 8.1°F (1942) | 2.53 in (1967) |
| December 3 | 72.0°F (1970) | 10.0°F (1942) | 2.71 in (1982) |
| December 4 | 72.0°F (2021) | 7.0°F (1991) | 1.56 in (1925) |
| December 5 | 69.1°F (2001) | 12.0°F (2025) | 0.93 in (1977) |
| December 6 | 66.9°F (1998) | 5.0°F (1977) | 1.84 in (2014) |
| December 7 | 71.1°F (1998) | 6.1°F (1977) | 3.60 in (1956) |
| December 8 | 68.0°F (1966) | 8.1°F (2006) | 1.66 in (1966) |
| December 9 | 64.0°F (1965) | 1.0°F (1995) | 0.86 in (2009) |
| December 10 | 66.9°F (1971) | 1.0°F (1977) | 1.39 in (1999) |
| December 11 | 70.0°F (2021) | 3.0°F (1962) | 1.71 in (1931) |
| December 12 | 64.9°F (1991) | -9.9°F (1962) | 1.53 in (1959) |
| December 13 | 69.1°F (2015) | -5.1°F (1962) | 1.92 in (1918) |
| December 14 | 70.0°F (1984) | -0.9°F (1985) | 1.17 in (1971) |
| December 15 | 66.9°F (1971) | -2.0°F (1989) | 1.56 in (1987) |
| December 16 | 66.9°F (1984) | -15.0°F (1989) | 1.03 in (1937) |
| December 17 | 66.0°F (1984) | -9.0°F (1989) | 2.06 in (1929) |
| December 18 | 64.9°F (1962) | -4.0°F (1989) | 2.17 in (2021) |
| December 19 | 64.0°F (1976) | -8.0°F (1963) | 1.63 in (1973) |
| December 20 | 64.0°F (1988) | -8.0°F (1989) | 1.35 in (1957) |
| December 21 | 66.0°F (1967) | -9.9°F (1989) | 4.27 in (1967) |
| December 22 | 62.1°F (1965) | -20.0°F (1989) | 2.06 in (2013) |
| December 23 | 64.0°F (1982) | -18.9°F (1989) | 1.06 in (2003) |
| December 24 | 66.0°F (2025) | -11.0°F (1989) | 3.44 in (1982) |
| December 25 | 64.0°F (1982) | -11.0°F (1983) | 1.44 in (2009) |
| December 26 | 70.0°F (1942) | -4.0°F (2000) | 0.73 in (2023) |
| December 27 | 69.1°F (2025) | 1.9°F (2017) | 2.47 in (2015) |
| December 28 | 69.1°F (1984) | 1.0°F (1961) | 1.61 in (2015) |
| December 29 | 71.1°F (2025) | -2.9°F (1983) | 1.25 in (1990) |
| December 30 | 66.9°F (1965) | -8.0°F (1983) | 2.39 in (1990) |
| December 31 | 62.1°F (1965) | -7.1°F (1976) | 1.60 in (1978) |