December weather in Harriman, TN
The average temperature in Harriman in December is 40.3°F (31.6°F–49.0°F). Average precipitation: 6.05 inches.
December is a winter month in Harriman, and is cooler than the annual average of 58.4°F. Daily temperatures swing about 17.4°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 34m. For travel, December is a wet month.
Avg High
49.0°F
Avg Low
31.6°F
Precipitation
6.05 in
Snow
0.1 in
December records in Harriman
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2006) | 21.0°F (2013) | 3.05 in (1982) |
| December 2 | 66.9°F (2012) | 21.9°F (2002) | 3.12 in (1991) |
| December 3 | 70.0°F (2012) | 23.0°F (2002) | 1.80 in (1905) |
| December 4 | 72.0°F (2012) | 19.9°F (2006) | 1.95 in (1955) |
| December 5 | 66.0°F (2013) | 21.9°F (2006) | 1.76 in (1993) |
| December 6 | 73.0°F (2013) | 17.1°F (2024) | 1.98 in (1930) |
| December 7 | 70.0°F (2001) | 18.0°F (2024) | 3.00 in (1936) |
| December 8 | 71.1°F (2004) | 14.0°F (2006) | 1.77 in (1924) |
| December 9 | 69.1°F (2012) | 14.0°F (2006) | 3.20 in (2009) |
| December 10 | 66.0°F (2008) | 14.0°F (2006) | 3.75 in (1972) |
| December 11 | 73.0°F (2007) | 14.0°F (2006) | 1.19 in (1967) |
| December 12 | 73.0°F (2007) | 14.0°F (2006) | 1.90 in (1961) |
| December 13 | 66.9°F (2015) | 19.0°F (2010) | 3.45 in (1956) |
| December 14 | 69.1°F (2015) | 12.9°F (2010) | 2.85 in (1901) |
| December 15 | 69.1°F (2015) | 12.0°F (2025) | 2.70 in (2022) |
| December 16 | 69.1°F (2015) | 12.0°F (2025) | 1.51 in (1947) |
| December 17 | 68.0°F (2021) | 21.9°F (2004) | 2.30 in (1961) |
| December 18 | 66.9°F (2016) | 14.0°F (2000) | 2.68 in (1915) |
| December 19 | 66.9°F (2006) | 15.1°F (2000) | 1.71 in (1995) |
| December 20 | 64.9°F (2008) | 10.9°F (2004) | 1.85 in (1903) |
| December 21 | 57.9°F (2006) | 12.9°F (2000) | 2.03 in (1884) |
| December 22 | 70.0°F (2013) | 10.9°F (2008) | 1.94 in (2013) |
| December 23 | 64.9°F (2017) | 3.9°F (2022) | 4.30 in (1990) |
| December 24 | 64.9°F (2017) | 3.0°F (2022) | 2.00 in (2014) |
| December 25 | 73.0°F (2015) | 6.1°F (2022) | 2.37 in (1948) |
| December 26 | 70.0°F (2025) | 12.0°F (2022) | 4.45 in (1973) |
| December 27 | 70.0°F (2021) | 14.0°F (2020) | 1.96 in (1901) |
| December 28 | 75.0°F (2015) | 15.1°F (2010) | 2.23 in (2018) |
| December 29 | 75.0°F (2015) | 15.1°F (2010) | 3.30 in (1954) |
| December 30 | 66.9°F (2019) | 15.1°F (2010) | 2.70 in (1969) |
| December 31 | 64.9°F (2021) | 17.1°F (2000) | 5.50 in (1997) |