December weather in Mount Carroll, IL
The average temperature in Mount Carroll in December is 26.4°F (17.1°F–35.8°F). Average precipitation: 2.21 inches. Average snowfall is 8.8 inches.
December is a winter month in Mount Carroll, and is cooler than the annual average of 48.5°F. Daily temperatures swing about 18.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 57m. For travel, December is cold.
Avg High
35.8°F
Avg Low
17.1°F
Precipitation
2.21 in
Snow
8.8 in
December records in Mount Carroll
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (1962) | -2.9°F (1976) | 1.49 in (1985) |
| December 2 | 62.1°F (1951) | -6.0°F (1976) | 1.34 in (2007) |
| December 3 | 66.0°F (1951) | -13.0°F (1940) | 2.03 in (1982) |
| December 4 | 66.9°F (2012) | -6.0°F (2025) | 1.00 in (1947) |
| December 5 | 69.1°F (1998) | -9.9°F (2005) | 1.32 in (1973) |
| December 6 | 68.0°F (2001) | -8.0°F (1964) | 0.90 in (1982) |
| December 7 | 63.0°F (1916) | -14.1°F (2005) | 1.13 in (1994) |
| December 8 | 63.0°F (1946) | -11.0°F (1902) | 0.90 in (1980) |
| December 9 | 61.0°F (1946) | -18.0°F (1958) | 1.22 in (2009) |
| December 10 | 72.0°F (1996) | -22.0°F (1919) | 2.00 in (2003) |
| December 11 | 62.1°F (1949) | -20.0°F (1972) | 1.18 in (1949) |
| December 12 | 60.1°F (1949) | -11.0°F (1976) | 1.33 in (2020) |
| December 13 | 62.1°F (2015) | -24.0°F (1903) | 1.23 in (1928) |
| December 14 | 61.0°F (2015) | -20.0°F (1904) | 1.88 in (2015) |
| December 15 | 57.0°F (1975) | -20.0°F (1903) | 2.20 in (1971) |
| December 16 | 71.1°F (2021) | -15.0°F (1951) | 1.57 in (1921) |
| December 17 | 55.9°F (1984) | -15.0°F (1903) | 0.60 in (1921) |
| December 18 | 57.9°F (1939) | -18.9°F (1985) | 0.41 in (1993) |
| December 19 | 59.0°F (1918) | -24.0°F (1985) | 1.18 in (1957) |
| December 20 | 60.1°F (1918) | -23.1°F (1985) | 1.32 in (1987) |
| December 21 | 57.9°F (1918) | -18.9°F (1963) | 1.12 in (2006) |
| December 22 | 54.0°F (2019) | -18.0°F (1963) | 0.57 in (1923) |
| December 23 | 55.9°F (1965) | -20.0°F (1963) | 0.78 in (1979) |
| December 24 | 59.0°F (2015) | -23.1°F (1983) | 1.13 in (1965) |
| December 25 | 57.0°F (1982) | -22.0°F (2000) | 1.35 in (2009) |
| December 26 | 61.0°F (2019) | -27.9°F (1914) | 1.07 in (1942) |
| December 27 | 55.0°F (1946) | -26.0°F (1950) | 1.72 in (1904) |
| December 28 | 57.9°F (1982) | -22.0°F (1924) | 0.97 in (1927) |
| December 29 | 64.9°F (1984) | -17.0°F (1925) | 1.54 in (2015) |
| December 30 | 59.0°F (2022) | -20.9°F (1909) | 1.56 in (1936) |
| December 31 | 59.0°F (1965) | -18.0°F (1914) | 0.66 in (1931) |