December weather in South Mountain, TX
The average temperature in South Mountain in December is 48.7°F (36.5°F–60.9°F). Average precipitation: 2.53 inches.
December is a winter month in South Mountain, and is cooler than the annual average of 66.5°F. Daily temperatures swing about 24.4°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 9h 58m. For travel, December is cool.
Avg High
60.9°F
Avg Low
36.5°F
Precipitation
2.53 in
Snow
0.1 in
December records in South Mountain
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 82.0°F (1942) | 17.1°F (1976) | 1.10 in (1968) |
| December 2 | 84.9°F (1908) | 18.0°F (2006) | 3.60 in (1913) |
| December 3 | 88.0°F (2005) | 19.9°F (1985) | 2.40 in (1913) |
| December 4 | 89.1°F (1954) | 21.9°F (1974) | 0.90 in (1913) |
| December 5 | 81.0°F (1939) | 15.1°F (2006) | 1.75 in (1944) |
| December 6 | 82.9°F (1939) | 17.1°F (1999) | 3.40 in (1915) |
| December 7 | 84.0°F (1939) | 15.1°F (2005) | 2.88 in (1960) |
| December 8 | 82.0°F (1952) | 18.0°F (1917) | 1.70 in (2002) |
| December 9 | 82.0°F (1939) | 17.1°F (1917) | 1.65 in (1980) |
| December 10 | 86.0°F (1939) | 12.9°F (1978) | 1.80 in (1998) |
| December 11 | 84.9°F (1939) | 19.0°F (1919) | 3.75 in (1985) |
| December 12 | 80.1°F (1948) | 18.0°F (1917) | 1.34 in (1923) |
| December 13 | 82.9°F (1973) | 12.9°F (1989) | 0.90 in (2015) |
| December 14 | 81.0°F (1995) | 12.9°F (1958) | 1.30 in (1992) |
| December 15 | 82.0°F (1942) | 14.0°F (1916) | 2.05 in (1906) |
| December 16 | 84.9°F (1977) | 9.0°F (1989) | 3.40 in (2001) |
| December 17 | 84.9°F (1908) | 15.1°F (1972) | 0.95 in (2017) |
| December 18 | 84.0°F (1936) | 17.1°F (2016) | 1.36 in (1965) |
| December 19 | 81.0°F (1908) | 15.1°F (1996) | 0.83 in (1953) |
| December 20 | 79.0°F (1966) | 14.0°F (1909) | 2.21 in (1962) |
| December 21 | 84.9°F (2010) | 16.0°F (1916) | 4.90 in (1997) |
| December 22 | 78.1°F (2003) | 6.1°F (1989) | 1.50 in (1937) |
| December 23 | 79.0°F (1970) | -4.0°F (1989) | 0.90 in (1909) |
| December 24 | 80.1°F (1942) | 9.0°F (1983) | 1.14 in (1979) |
| December 25 | 79.0°F (2016) | 7.0°F (1983) | 1.75 in (1975) |
| December 26 | 84.0°F (2016) | 14.0°F (1983) | 1.65 in (2018) |
| December 27 | 88.0°F (1942) | 19.9°F (1920) | 2.10 in (2018) |
| December 28 | 82.0°F (2016) | 18.0°F (1920) | 1.20 in (1994) |
| December 29 | 82.9°F (1951) | 10.9°F (1983) | 1.80 in (1952) |
| December 30 | 90.0°F (1951) | 6.1°F (1983) | 1.10 in (2002) |
| December 31 | 84.9°F (1951) | 14.0°F (1927) | 2.25 in (2020) |