Weather on December 18
Chattanooga, TN
55 Years of Data
Avg High
52°F
Avg Low
31°F
Warmest
2021
64°F avg
Coldest
1975
20°F avg
About This Date
December 18th in Chattanooga, TN typically brings cool winter weather, with average highs around 52°F and lows near 31°F. Over 55 years of records, the warmest December 18th was in 2021 (64°F average), while the coldest was 1975 (20°F) — a 44°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 18th dates historically, with the wettest December 18th recording 4.57" of rain. The last decade has been 6.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.9°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Chattanooga, TN? Bring layers as temperatures can vary throughout the day.
Warming Trend
2.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 40° | 50° | 1.63" | — |
| 2024 | 71° | 48° | 60° | 0.2" | — |
| 2023 | 55° | 33° | 44° | — | — |
| 2022 | 46° | 29° | 38° | — | — |
| 2021warmest | 73° | 55° | 64° | 1.55" | — |
| 2020 | 47° | 26° | 37° | — | — |
| 2019 | 49° | 30° | 40° | — | — |
| 2018 | 58° | 32° | 45° | — | — |
| 2017 | 59° | 40° | 49° | — | — |
| 2016 | 69° | 30° | 50° | 1.93" | — |
| 2015 | 40° | 29° | 35° | — | — |
| 2014 | 47° | 33° | 40° | 0.03" | — |
| 2013 | 52° | 29° | 41° | — | — |
| 2012 | 61° | 42° | 51° | — | — |
| 2011 | 54° | 28° | 41° | — | — |
| 2010 | 46° | 28° | 37° | — | — |
| 2009 | 46° | 38° | 42° | 4.57" | — |
| 2008 | 63° | 54° | 58° | — | — |
| 2007 | 52° | 26° | 39° | — | — |
| 2006 | 73° | 37° | 55° | — | — |
| 2005 | 54° | 29° | 41° | — | — |
| 2004 | 54° | 26° | 40° | — | — |
| 2003 | 49° | 28° | 38° | 0.15" | — |
| 2002 | 59° | 39° | 49° | — | — |
| 2001 | 61° | 39° | 50° | — | — |
| 2000 | 42° | 18° | 30° | 0.1" | — |
| 1999 | 55° | 33° | 44° | 0.53" | — |
| 1998 | 52° | 25° | 38° | — | — |
| 1997 | 58° | 26° | 42° | — | — |
| 1996 | 41° | 30° | 36° | — | — |
| 1995 | 52° | 48° | 50° | 2.77" | — |
| 1994 | 51° | 33° | 42° | — | — |
| 1993 | 51° | 38° | 44° | 0.33" | — |
| 1992 | 57° | 30° | 44° | — | — |
| 1991 | 48° | 28° | 38° | — | — |
| 1990 | 70° | 52° | 61° | 0.66" | — |
| 1989 | 39° | 27° | 33° | 0.03" | — |
| 1988 | 43° | 17° | 30° | — | — |
| 1987 | 45° | 25° | 35° | — | — |
| 1986 | 55° | 34° | 44° | 0.18" | — |
| 1985 | 40° | 22° | 31° | — | — |
| 1984 | 71° | 44° | 58° | — | — |
| 1983 | 51° | 25° | 38° | — | — |
| 1982 | 50° | 23° | 37° | — | — |
| 1981 | 31° | 19° | 25° | — | — |
| 1980 | 59° | 25° | 42° | — | — |
| 1979 | 46° | 18° | 32° | — | — |
| 1978 | 46° | 25° | 35° | — | — |
| 1977 | 57° | 37° | 47° | — | — |
| 1976 | 68° | 32° | 50° | — | — |
| 1975coldest | 28° | 12° | 20° | — | — |
| 1974 | 44° | 16° | 30° | — | — |
| 1973 | 41° | 20° | 30° | — | — |
| 1972 | 46° | 12° | 29° | — | — |
| 1971 | 42° | 24° | 33° | — | — |
55 years of data from CHATTANOOGA AP