December weather in Forest City, IL
The average temperature in Forest City in December is 30.5°F (21.8°F–39.1°F). Average precipitation: 2.35 inches. Average snowfall is 6.9 inches.
December is a winter month in Forest City, and is cooler than the annual average of 52.5°F. Daily temperatures swing about 17.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 8m. For travel, December is cold.
Avg High
39.1°F
Avg Low
21.8°F
Precipitation
2.35 in
Snow
6.9 in
December records in Forest City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (1970) | 8.1°F (2002) | 1.93 in (2006) |
| December 2 | 66.9°F (1982) | 1.0°F (2006) | 1.41 in (1921) |
| December 3 | 71.1°F (1970) | 1.9°F (2006) | 2.30 in (1982) |
| December 4 | 66.9°F (1998) | -4.0°F (2006) | 1.00 in (1973) |
| December 5 | 72.0°F (1998) | -0.9°F (2006) | 1.71 in (1999) |
| December 6 | 69.1°F (2001) | -7.1°F (1984) | 1.00 in (1942) |
| December 7 | 70.0°F (1980) | -6.0°F (1976) | 1.85 in (1994) |
| December 8 | 64.9°F (1966) | -7.1°F (2006) | 1.20 in (1980) |
| December 9 | 72.0°F (1991) | -2.9°F (1977) | 0.76 in (1931) |
| December 10 | 60.1°F (1993) | -5.1°F (1977) | 1.20 in (2003) |
| December 11 | 63.0°F (1979) | -8.0°F (1972) | 1.10 in (1985) |
| December 12 | 64.9°F (1979) | -6.0°F (2000) | 1.13 in (1972) |
| December 13 | 66.0°F (1975) | -9.0°F (2000) | 1.30 in (1923) |
| December 14 | 68.0°F (1975) | -5.1°F (1989) | 1.46 in (2015) |
| December 15 | 63.0°F (1971) | -14.1°F (1989) | 1.90 in (1971) |
| December 16 | 57.9°F (1984) | -11.9°F (1989) | 0.75 in (1992) |
| December 17 | 62.1°F (1984) | -7.1°F (1989) | 1.07 in (1924) |
| December 18 | 57.0°F (2002) | -11.0°F (1985) | 2.00 in (2002) |
| December 19 | 60.1°F (2002) | -15.0°F (1983) | 1.25 in (2008) |
| December 20 | 60.1°F (1988) | -23.1°F (1983) | 1.25 in (1987) |
| December 21 | 64.0°F (1967) | -17.0°F (1989) | 1.68 in (1949) |
| December 22 | 60.1°F (1984) | -20.9°F (1989) | 1.95 in (1949) |
| December 23 | 55.0°F (1994) | -23.1°F (1989) | 2.60 in (2003) |
| December 24 | 63.0°F (1982) | -18.0°F (1983) | 1.20 in (2009) |
| December 25 | 61.0°F (1982) | -16.1°F (1983) | 2.10 in (1982) |
| December 26 | 59.0°F (1982) | -9.9°F (1983) | 0.58 in (1949) |
| December 27 | 57.0°F (1971) | -2.9°F (1983) | 2.21 in (1942) |
| December 28 | 63.0°F (1982) | -8.0°F (2000) | 1.18 in (1968) |
| December 29 | 71.1°F (1984) | -8.0°F (1981) | 1.51 in (2015) |
| December 30 | 62.1°F (2006) | -13.0°F (1983) | 1.35 in (1971) |
| December 31 | 64.0°F (2002) | -9.0°F (1976) | 1.20 in (2010) |