December weather in Wellington, IL
The average temperature in Wellington in December is 31.0°F (23.9°F–38.1°F). Average precipitation: 2.12 inches. Average snowfall is 5.3 inches.
December is a winter month in Wellington, and is cooler than the annual average of 52.3°F. Daily temperatures swing about 14.2°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 7m. For travel, December is cold.
Avg High
38.1°F
Avg Low
23.9°F
Precipitation
2.12 in
Snow
5.3 in
December records in Wellington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 68.0°F (1970) | 6.1°F (1937) | 0.96 in (2023) |
| December 2 | 70.0°F (1982) | -0.9°F (1942) | 1.29 in (1967) |
| December 3 | 72.0°F (2012) | -9.9°F (1929) | 0.88 in (1938) |
| December 4 | 66.9°F (1998) | -2.0°F (2025) | 1.15 in (1925) |
| December 5 | 66.0°F (1956) | 1.0°F (2005) | 1.02 in (1906) |
| December 6 | 69.1°F (1998) | -2.9°F (1977) | 1.03 in (2004) |
| December 7 | 64.9°F (1946) | -4.0°F (1977) | 2.32 in (1966) |
| December 8 | 64.9°F (1946) | -6.0°F (1909) | 1.34 in (1924) |
| December 9 | 62.1°F (1918) | -11.9°F (1958) | 0.77 in (1907) |
| December 10 | 64.9°F (1971) | -11.0°F (1917) | 1.03 in (1971) |
| December 11 | 62.1°F (1931) | -13.0°F (1917) | 1.00 in (1985) |
| December 12 | 66.0°F (2015) | -7.1°F (1962) | 1.25 in (1903) |
| December 13 | 62.1°F (1975) | -11.0°F (1903) | 1.50 in (1923) |
| December 14 | 64.9°F (1975) | -9.9°F (2025) | 0.89 in (1907) |
| December 15 | 70.0°F (1948) | -14.1°F (1917) | 1.75 in (1987) |
| December 16 | 64.0°F (1984) | -16.1°F (1932) | 0.97 in (2023) |
| December 17 | 60.1°F (1908) | -9.9°F (1914) | 0.83 in (1929) |
| December 18 | 60.1°F (1939) | -11.0°F (1985) | 2.25 in (1924) |
| December 19 | 57.9°F (1918) | -11.9°F (1983) | 0.70 in (2025) |
| December 20 | 61.0°F (1949) | -11.9°F (1963) | 1.16 in (1957) |
| December 21 | 62.1°F (1967) | -18.0°F (1989) | 2.34 in (1967) |
| December 22 | 59.0°F (1931) | -20.9°F (1989) | 0.95 in (1949) |
| December 23 | 63.0°F (1933) | -16.1°F (1989) | 1.42 in (1988) |
| December 24 | 60.1°F (1932) | -18.0°F (1983) | 1.23 in (1965) |
| December 25 | 62.1°F (1982) | -14.1°F (1983) | 0.93 in (1982) |
| December 26 | 64.0°F (2019) | -18.0°F (1914) | 1.51 in (2008) |
| December 27 | 63.0°F (2008) | -11.9°F (2017) | 1.00 in (2015) |
| December 28 | 66.9°F (1984) | -22.0°F (1924) | 1.99 in (2015) |
| December 29 | 62.1°F (1984) | -9.0°F (1917) | 1.67 in (2024) |
| December 30 | 63.0°F (1965) | -13.0°F (1909) | 1.97 in (1990) |
| December 31 | 62.1°F (1951) | -11.0°F (1976) | 1.87 in (2018) |