December weather in Mount Vernon, TX
The average temperature in Mount Vernon in December is 46.8°F (36.1°F–57.6°F). Average precipitation: 4.70 inches.
December is a winter month in Mount Vernon, and is cooler than the annual average of 64.6°F. Daily temperatures swing about 21.5°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 49m. For travel, December is cool.
Avg High
57.6°F
Avg Low
36.1°F
Precipitation
4.70 in
Snow
0.1 in
December records in Mount Vernon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 78.1°F (2014) | 19.0°F (1979) | 1.28 in (1991) |
| December 2 | 81.0°F (1982) | 19.0°F (1985) | 0.75 in (2009) |
| December 3 | 80.1°F (1982) | 19.0°F (1985) | 4.70 in (1982) |
| December 4 | 84.0°F (2005) | 21.0°F (2006) | 1.65 in (2002) |
| December 5 | 80.1°F (2017) | 21.0°F (2025) | 1.99 in (2011) |
| December 6 | 78.1°F (1998) | 21.0°F (1972) | 1.34 in (2013) |
| December 7 | 79.0°F (1966) | 21.0°F (1972) | 1.94 in (1971) |
| December 8 | 81.0°F (1966) | 15.1°F (2006) | 1.31 in (1997) |
| December 9 | 80.1°F (2007) | 15.1°F (2006) | 2.54 in (1971) |
| December 10 | 78.1°F (2020) | 14.0°F (1995) | 3.56 in (1971) |
| December 11 | 82.0°F (2021) | 18.0°F (1966) | 4.53 in (1985) |
| December 12 | 79.0°F (2015) | 19.0°F (1966) | 2.02 in (1999) |
| December 13 | 78.1°F (1973) | 18.0°F (1966) | 4.52 in (2015) |
| December 14 | 75.9°F (1995) | 15.1°F (1985) | 1.11 in (1987) |
| December 15 | 79.0°F (1995) | 15.1°F (1985) | 3.31 in (1992) |
| December 16 | 79.0°F (2021) | 15.1°F (1989) | 3.28 in (2001) |
| December 17 | 81.0°F (2021) | 14.0°F (1979) | 2.78 in (2001) |
| December 18 | 78.1°F (2006) | 12.9°F (1979) | 1.91 in (1990) |
| December 19 | 78.1°F (1980) | 15.1°F (1981) | 1.17 in (1969) |
| December 20 | 75.9°F (2012) | 15.1°F (2016) | 1.24 in (2017) |
| December 21 | 75.9°F (1967) | 15.1°F (1976) | 2.00 in (1997) |
| December 22 | 79.0°F (2010) | 3.9°F (1983) | 1.37 in (2013) |
| December 23 | 73.9°F (1974) | -5.1°F (1989) | 1.39 in (2017) |
| December 24 | 79.0°F (2025) | -0.9°F (1989) | 2.05 in (2016) |
| December 25 | 79.0°F (2021) | 3.0°F (1983) | 1.56 in (1975) |
| December 26 | 79.0°F (2021) | 5.0°F (1983) | 3.74 in (1987) |
| December 27 | 81.0°F (2016) | 15.1°F (1983) | 2.72 in (2018) |
| December 28 | 81.0°F (2005) | 19.9°F (1967) | 8.42 in (2015) |
| December 29 | 80.1°F (2021) | 9.0°F (1983) | 1.69 in (1969) |
| December 30 | 75.9°F (1984) | 3.0°F (1983) | 1.44 in (2006) |
| December 31 | 75.9°F (2021) | 3.9°F (1983) | 3.02 in (2020) |