December weather in Mount Vernon, IN
The average temperature in Mount Vernon in December is 36.6°F (27.3°F–45.9°F). Average precipitation: 3.79 inches. Average snowfall is 1.1 inches.
December is a winter month in Mount Vernon, and is cooler than the annual average of 56°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 23m. For travel, December is cool.
Avg High
45.9°F
Avg Low
27.3°F
Precipitation
3.79 in
Snow
1.1 in
December records in Mount Vernon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.9°F (1899) | 5.0°F (1964) | 1.74 in (2006) |
| December 2 | 68.0°F (1970) | 9.0°F (1964) | 1.60 in (1905) |
| December 3 | 77.0°F (1982) | 0.0°F (1929) | 2.04 in (1991) |
| December 4 | 73.0°F (1982) | 12.0°F (1893) | 2.05 in (1982) |
| December 5 | 72.0°F (2001) | 10.9°F (1895) | 2.05 in (2011) |
| December 6 | 70.0°F (2001) | 8.1°F (1937) | 1.80 in (1953) |
| December 7 | 71.1°F (1916) | 6.1°F (1977) | 1.55 in (1951) |
| December 8 | 68.0°F (1980) | 0.0°F (1927) | 1.68 in (1972) |
| December 9 | 70.0°F (1966) | -6.0°F (1917) | 1.26 in (1956) |
| December 10 | 70.0°F (1918) | -8.0°F (1917) | 1.52 in (1889) |
| December 11 | 73.9°F (1931) | -7.1°F (1917) | 1.72 in (1949) |
| December 12 | 69.1°F (1996) | -11.9°F (1917) | 1.14 in (1959) |
| December 13 | 70.0°F (2015) | -6.0°F (1917) | 2.02 in (1923) |
| December 14 | 70.0°F (2015) | -2.0°F (1898) | 2.60 in (1901) |
| December 15 | 70.0°F (1975) | -9.9°F (1914) | 2.29 in (2018) |
| December 16 | 72.0°F (1984) | -8.0°F (1914) | 1.18 in (1947) |
| December 17 | 70.0°F (1984) | -7.1°F (1989) | 3.70 in (2001) |
| December 18 | 69.1°F (1984) | -2.0°F (1901) | 1.59 in (1990) |
| December 19 | 64.9°F (1962) | -5.1°F (1963) | 1.26 in (1934) |
| December 20 | 66.9°F (2013) | -8.0°F (1901) | 1.38 in (1957) |
| December 21 | 66.0°F (1967) | -4.0°F (1901) | 2.19 in (1920) |
| December 22 | 68.0°F (1967) | -16.1°F (1989) | 4.52 in (2013) |
| December 23 | 68.0°F (1931) | -15.0°F (1989) | 1.50 in (1907) |
| December 24 | 64.9°F (1893) | -14.1°F (1989) | 2.45 in (1921) |
| December 25 | 69.1°F (1982) | -8.0°F (1983) | 1.73 in (1982) |
| December 26 | 69.1°F (1942) | -7.1°F (1924) | 1.60 in (1987) |
| December 27 | 68.0°F (1942) | -0.9°F (1925) | 1.82 in (1904) |
| December 28 | 72.0°F (2008) | -11.0°F (1924) | 1.93 in (1988) |
| December 29 | 69.1°F (2025) | -0.9°F (1924) | 1.50 in (2024) |
| December 30 | 70.0°F (1984) | -5.1°F (1983) | 3.90 in (1932) |
| December 31 | 68.0°F (1965) | -5.1°F (1976) | 1.74 in (2002) |