Weather on December 21
Chattanooga, TN
55 Years of Data
Avg High
50°F
Avg Low
33°F
Warmest
2013
63°F avg
Coldest
1976
22°F avg
About This Date
December 21st in Chattanooga, TN typically brings cool winter weather, with average highs around 50°F and lows near 33°F. Over 55 years of records, the warmest December 21st was in 2013 (63°F average), while the coldest was 1976 (22°F) — a 41°F range across recorded history. Precipitation has occurred on 44% of recorded December 21st dates, with snow falling 2% of the time. The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Chattanooga, TN? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 34° | 47° | — | — |
| 2024 | 44° | 33° | 39° | — | — |
| 2023 | 53° | 26° | 40° | — | — |
| 2022 | 51° | 31° | 41° | — | — |
| 2021 | 47° | 38° | 42° | 0.05" | — |
| 2020 | 58° | 40° | 49° | — | — |
| 2019 | 52° | 38° | 45° | — | — |
| 2018 | 48° | 40° | 44° | 1.12" | — |
| 2017 | 61° | 51° | 56° | — | — |
| 2016 | 52° | 29° | 41° | — | — |
| 2015 | 54° | 45° | 49° | 0.41" | — |
| 2014 | 48° | 31° | 40° | — | — |
| 2013warmest | 71° | 56° | 63° | 0.91" | — |
| 2012 | 44° | 34° | 39° | — | — |
| 2011 | 66° | 48° | 57° | 2.44" | — |
| 2010 | 44° | 39° | 42° | 0.1" | — |
| 2009 | 52° | 27° | 39° | — | — |
| 2008 | 63° | 22° | 42° | 0.43" | — |
| 2007 | 57° | 46° | 52° | 0.15" | — |
| 2006 | 57° | 51° | 54° | 0.25" | — |
| 2005 | 43° | 22° | 32° | — | — |
| 2004 | 59° | 23° | 41° | — | — |
| 2003 | 51° | 20° | 35° | — | — |
| 2002 | 56° | 29° | 42° | — | — |
| 2001 | 55° | 27° | 41° | — | — |
| 2000 | 33° | 22° | 27° | 0.08" | — |
| 1999 | 49° | 37° | 43° | 0.53" | — |
| 1998 | 67° | 52° | 59° | 0.03" | — |
| 1997 | 51° | 37° | 44° | 1.55" | — |
| 1996 | 43° | 15° | 29° | — | — |
| 1995 | 40° | 23° | 31° | — | — |
| 1994 | 58° | 30° | 44° | 0.13" | — |
| 1993 | 45° | 30° | 37° | — | — |
| 1992 | 47° | 40° | 43° | 0.28" | — |
| 1991 | 46° | 39° | 43° | 0.08" | — |
| 1990 | 58° | 48° | 53° | 0.03" | — |
| 1989 | 37° | 14° | 26° | — | — |
| 1988 | 57° | 51° | 54° | 0.43" | — |
| 1987 | 53° | 44° | 49° | 0.25" | — |
| 1986 | 50° | 27° | 38° | — | — |
| 1985 | 34° | 18° | 26° | — | — |
| 1984 | 69° | 55° | 62° | 0.3" | — |
| 1983 | 50° | 37° | 44° | 0.69" | — |
| 1982 | 53° | 28° | 41° | — | — |
| 1981 | 34° | 16° | 25° | 1.17" | 0.1" |
| 1980 | 39° | 20° | 29° | — | — |
| 1979 | 53° | 27° | 40° | — | — |
| 1978 | 60° | 33° | 47° | 0.51" | — |
| 1977 | 38° | 28° | 33° | — | — |
| 1976coldest | 28° | 15° | 22° | — | — |
| 1975 | 36° | 27° | 31° | — | — |
| 1974 | 53° | 29° | 41° | — | — |
| 1973 | 31° | 21° | 26° | — | — |
| 1972 | 49° | 47° | 48° | 2.46" | — |
| 1971 | 67° | 44° | 55° | — | — |
55 years of data from CHATTANOOGA AP