December weather in Rockton, IL
The average temperature in Rockton in December is 23.8°F (17.0°F–30.5°F). Average precipitation: 1.96 inches. Average snowfall is 10.2 inches.
December is a winter month in Rockton, and is cooler than the annual average of 45.4°F. Daily temperatures swing about 13.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 54m. For travel, December is cold.
Avg High
30.5°F
Avg Low
17.0°F
Precipitation
1.96 in
Snow
10.2 in
December records in Rockton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (1998) | -9.9°F (1893) | 1.46 in (1985) |
| December 2 | 64.0°F (1922) | -7.1°F (1893) | 1.08 in (1912) |
| December 3 | 64.9°F (1970) | -14.1°F (1940) | 1.01 in (1938) |
| December 4 | 66.0°F (2012) | -11.0°F (1893) | 0.85 in (1973) |
| December 5 | 64.0°F (1998) | -2.0°F (1991) | 0.80 in (1948) |
| December 6 | 66.0°F (2001) | -6.0°F (1926) | 0.80 in (1919) |
| December 7 | 63.0°F (1916) | -8.0°F (1936) | 1.54 in (1980) |
| December 8 | 63.0°F (1946) | -6.0°F (1902) | 0.50 in (1966) |
| December 9 | 64.9°F (1939) | -13.0°F (1958) | 1.10 in (2009) |
| December 10 | 59.0°F (1911) | -16.1°F (1919) | 1.64 in (2003) |
| December 11 | 60.1°F (1949) | -11.0°F (1972) | 0.95 in (1931) |
| December 12 | 60.1°F (1949) | -8.0°F (1962) | 1.85 in (1899) |
| December 13 | 59.0°F (1991) | -17.0°F (1903) | 1.17 in (1901) |
| December 14 | 57.9°F (2015) | -15.0°F (1904) | 1.60 in (2015) |
| December 15 | 60.1°F (1971) | -14.1°F (1917) | 2.00 in (1971) |
| December 16 | 66.9°F (2021) | -11.9°F (1932) | 0.99 in (1992) |
| December 17 | 55.9°F (1939) | -15.0°F (1903) | 1.10 in (1921) |
| December 18 | 53.1°F (1939) | -17.0°F (1922) | 1.04 in (1957) |
| December 19 | 54.0°F (1918) | -18.0°F (1983) | 0.93 in (1895) |
| December 20 | 54.0°F (1988) | -17.0°F (1983) | 1.20 in (1952) |
| December 21 | 57.0°F (1907) | -16.1°F (1989) | 1.00 in (2012) |
| December 22 | 54.0°F (1957) | -16.1°F (1989) | 1.40 in (1968) |
| December 23 | 55.0°F (1941) | -17.0°F (1983) | 1.00 in (2005) |
| December 24 | 57.9°F (1893) | -23.1°F (1983) | 1.15 in (1979) |
| December 25 | 57.9°F (1982) | -22.0°F (1983) | 1.30 in (2009) |
| December 26 | 55.9°F (1982) | -25.1°F (1903) | 1.00 in (1942) |
| December 27 | 54.0°F (1907) | -20.0°F (1933) | 1.79 in (1942) |
| December 28 | 59.0°F (1982) | -23.1°F (1924) | 1.78 in (1936) |
| December 29 | 63.0°F (1984) | -14.1°F (1903) | 1.15 in (2015) |
| December 30 | 59.0°F (2022) | -22.0°F (1903) | 1.29 in (1972) |
| December 31 | 57.0°F (1965) | -14.1°F (1968) | 0.62 in (1978) |