Weather on December 20
Chattanooga, TN
55 Years of Data
Avg High
51°F
Avg Low
34°F
Warmest
1978
67°F avg
Coldest
1981
21°F avg
About This Date
December 20th in Chattanooga, TN typically brings cool winter weather, with average highs around 51°F and lows near 34°F. Over 55 years of records, the warmest December 20th was in 1978 (67°F average), while the coldest was 1981 (21°F) — a 46°F range across recorded history. Precipitation has occurred on 36% of recorded December 20th dates, with snow falling 4% of the time. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Chattanooga, TN? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 28° | 45° | — | — |
| 2024 | 48° | 31° | 40° | — | — |
| 2023 | 48° | 25° | 37° | — | — |
| 2022 | 47° | 39° | 43° | — | — |
| 2021 | 51° | 36° | 43° | — | — |
| 2020 | 52° | 42° | 47° | 0.08" | — |
| 2019 | 53° | 27° | 40° | — | — |
| 2018 | 48° | 46° | 47° | 2.11" | — |
| 2017 | 57° | 53° | 55° | 4.57" | — |
| 2016 | 46° | 30° | 38° | — | — |
| 2015 | 53° | 28° | 41° | — | — |
| 2014 | 50° | 33° | 42° | — | — |
| 2013 | 63° | 36° | 49° | — | — |
| 2012 | 56° | 42° | 49° | 2.26" | — |
| 2011 | 61° | 43° | 52° | — | — |
| 2010 | 46° | 23° | 35° | — | — |
| 2009 | 38° | 29° | 33° | — | — |
| 2008 | 64° | 53° | 59° | 1.93" | — |
| 2007 | 51° | 39° | 45° | 0.25" | — |
| 2006 | 61° | 40° | 50° | — | — |
| 2005 | 42° | 24° | 33° | — | — |
| 2004 | 34° | 16° | 25° | — | — |
| 2003 | 42° | 25° | 33° | — | — |
| 2002 | 54° | 40° | 47° | 0.03" | — |
| 2001 | 51° | 32° | 42° | — | — |
| 2000 | 32° | 15° | 24° | — | — |
| 1999 | 57° | 47° | 52° | 0.03" | — |
| 1998 | 55° | 47° | 51° | — | — |
| 1997 | 66° | 32° | 49° | — | — |
| 1996 | 32° | 16° | 24° | — | — |
| 1995 | 41° | 29° | 35° | — | — |
| 1994 | 57° | 28° | 43° | — | — |
| 1993 | 44° | 31° | 37° | 2.59" | — |
| 1992 | 57° | 45° | 51° | 3.89" | — |
| 1991 | 52° | 22° | 37° | — | — |
| 1990 | 53° | 42° | 48° | 1.02" | — |
| 1989 | 38° | 22° | 30° | — | — |
| 1988 | 63° | 33° | 48° | — | — |
| 1987 | 67° | 51° | 59° | 0.36" | — |
| 1986 | 56° | 30° | 43° | — | — |
| 1985 | 36° | 23° | 29° | 0.08" | 0.3" |
| 1984 | 62° | 55° | 59° | 0.91" | — |
| 1983 | 38° | 33° | 35° | — | — |
| 1982 | 55° | 30° | 43° | — | — |
| 1981coldest | 34° | 9° | 21° | — | — |
| 1980 | 35° | 21° | 28° | — | — |
| 1979 | 56° | 26° | 41° | — | — |
| 1978warmest | 74° | 60° | 67° | 0.3" | — |
| 1977 | 60° | 38° | 49° | 0.05" | — |
| 1976 | 57° | 26° | 42° | 2.49" | — |
| 1975 | 44° | 17° | 31° | — | — |
| 1974 | 47° | 40° | 43° | — | — |
| 1973 | 45° | 29° | 37° | 2.92" | 0.2" |
| 1972 | 58° | 44° | 51° | 0.36" | — |
| 1971 | 68° | 46° | 57° | 1.4" | — |
55 years of data from CHATTANOOGA AP