December weather in Decatur, TN
The average temperature in Decatur in December is 40.7°F (30.4°F–51.1°F). Average precipitation: 5.72 inches. Average snowfall is 0.6 inches.
December is a winter month in Decatur, and is cooler than the annual average of 58.4°F. Daily temperatures swing about 20.7°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 36m. For travel, December is a wet month.
Avg High
51.1°F
Avg Low
30.4°F
Precipitation
5.72 in
Snow
0.6 in
December records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (1998) | 19.0°F (1999) | 2.64 in (2010) |
| December 2 | 69.1°F (1998) | 17.1°F (2002) | 2.51 in (2015) |
| December 3 | 72.0°F (1998) | 18.0°F (2002) | 2.40 in (2023) |
| December 4 | 73.9°F (2021) | 16.0°F (2024) | 0.82 in (2016) |
| December 5 | 73.9°F (1998) | 16.0°F (2006) | 1.72 in (2002) |
| December 6 | 72.0°F (2013) | 12.9°F (2024) | 1.04 in (2022) |
| December 7 | 73.9°F (1998) | 14.0°F (2024) | 1.65 in (2004) |
| December 8 | 72.0°F (1998) | 12.9°F (2006) | 0.43 in (1998) |
| December 9 | 71.1°F (2012) | 10.0°F (2006) | 3.87 in (2009) |
| December 10 | 66.9°F (2008) | 10.0°F (2006) | 2.36 in (2023) |
| December 11 | 73.9°F (2007) | 15.1°F (2009) | 0.99 in (2008) |
| December 12 | 75.0°F (2007) | 16.0°F (2009) | 1.37 in (2008) |
| December 13 | 68.0°F (2015) | 17.1°F (2013) | 1.78 in (1998) |
| December 14 | 70.0°F (2015) | 10.9°F (2010) | 1.11 in (2000) |
| December 15 | 70.0°F (2015) | 9.0°F (2010) | 2.40 in (2022) |
| December 16 | 66.0°F (2006) | 10.9°F (2025) | 1.40 in (2012) |
| December 17 | 70.0°F (2021) | 17.1°F (2004) | 1.02 in (2019) |
| December 18 | 69.1°F (2006) | 12.0°F (2000) | 0.55 in (2016) |
| December 19 | 72.0°F (2006) | 12.0°F (2000) | 1.49 in (2009) |
| December 20 | 64.0°F (2008) | 9.0°F (2000) | 1.53 in (2002) |
| December 21 | 64.9°F (1997) | 9.0°F (2000) | 1.67 in (2018) |
| December 22 | 72.0°F (2013) | 10.9°F (2005) | 1.81 in (2013) |
| December 23 | 66.0°F (2017) | 7.0°F (2022) | 1.97 in (2019) |
| December 24 | 66.0°F (2017) | 5.0°F (2022) | 2.25 in (2014) |
| December 25 | 72.0°F (2015) | 7.0°F (2022) | 0.87 in (2009) |
| December 26 | 70.0°F (2016) | 10.0°F (2022) | 2.62 in (2015) |
| December 27 | 73.0°F (2021) | 12.0°F (2001) | 0.92 in (2011) |
| December 28 | 75.0°F (2015) | 10.9°F (2010) | 3.28 in (2018) |
| December 29 | 73.0°F (2015) | 10.0°F (2010) | 1.41 in (2013) |
| December 30 | 70.0°F (2019) | 15.1°F (2001) | 1.20 in (2021) |
| December 31 | 66.9°F (2021) | 14.0°F (2001) | 0.28 in (2009) |