December weather in Mountain City, TN
The average temperature in Mountain City in December is 37.6°F (26.3°F–48.9°F). Average precipitation: 3.89 inches. Average snowfall is 2.0 inches.
December is a winter month in Mountain City, and is cooler than the annual average of 53.4°F. Daily temperatures swing about 22.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 31m. For travel, December is cool.
Avg High
48.9°F
Avg Low
26.3°F
Precipitation
3.89 in
Snow
2.0 in
December records in Mountain City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.0°F (1998) | 3.9°F (1964) | 2.50 in (1974) |
| December 2 | 71.1°F (2006) | 5.0°F (1960) | 1.45 in (2015) |
| December 3 | 71.1°F (1998) | 7.0°F (1960) | 1.29 in (1991) |
| December 4 | 69.1°F (1964) | 8.1°F (2000) | 0.55 in (1962) |
| December 5 | 73.0°F (2001) | -5.1°F (1974) | 3.10 in (1993) |
| December 6 | 77.0°F (2001) | 0.0°F (1974) | 0.67 in (1959) |
| December 7 | 73.9°F (1998) | 7.0°F (1970) | 0.95 in (1957) |
| December 8 | 72.0°F (1998) | 7.0°F (1959) | 0.82 in (2011) |
| December 9 | 72.0°F (1998) | 3.9°F (2006) | 0.80 in (1996) |
| December 10 | 70.0°F (2012) | 0.0°F (1995) | 1.59 in (2004) |
| December 11 | 66.0°F (1971) | 0.0°F (1995) | 2.30 in (2025) |
| December 12 | 73.9°F (2007) | -16.1°F (1962) | 2.20 in (2025) |
| December 13 | 70.0°F (2015) | -24.0°F (1962) | 2.00 in (1998) |
| December 14 | 72.0°F (2015) | 1.9°F (1960) | 0.98 in (2020) |
| December 15 | 70.0°F (1971) | -4.0°F (1962) | 0.95 in (1972) |
| December 16 | 70.0°F (1971) | -5.1°F (1958) | 0.76 in (2007) |
| December 17 | 69.1°F (1967) | -2.0°F (1989) | 1.00 in (1992) |
| December 18 | 69.1°F (2001) | -5.1°F (1973) | 1.63 in (1961) |
| December 19 | 70.0°F (1990) | -2.9°F (1963) | 0.94 in (1959) |
| December 20 | 73.0°F (1967) | -5.1°F (2004) | 0.85 in (1957) |
| December 21 | 70.0°F (1967) | -5.1°F (1963) | 1.15 in (1970) |
| December 22 | 71.1°F (2013) | -9.9°F (1960) | 1.55 in (2018) |
| December 23 | 71.1°F (1990) | -13.0°F (1989) | 1.01 in (1992) |
| December 24 | 70.0°F (1964) | -13.0°F (1989) | 1.59 in (2015) |
| December 25 | 68.0°F (1964) | -8.0°F (1989) | 1.07 in (1962) |
| December 26 | 66.0°F (1959) | 1.9°F (2022) | 0.82 in (2023) |
| December 27 | 73.0°F (2015) | 3.0°F (2022) | 0.90 in (1974) |
| December 28 | 75.0°F (2015) | 5.0°F (1969) | 2.68 in (1958) |
| December 29 | 75.0°F (2015) | 5.0°F (1961) | 0.91 in (1993) |
| December 30 | 69.1°F (2021) | 8.1°F (1963) | 1.00 in (2024) |
| December 31 | 73.9°F (1990) | 0.0°F (1961) | 1.72 in (1973) |