Weather on October 21
Chattanooga, TN
55 Years of Data
Avg High
72°F
Avg Low
46°F
Warmest
2020
70°F avg
Coldest
1987
44°F avg
About This Date
October 21st in Chattanooga, TN typically brings pleasant fall weather, with average highs around 72°F and lows near 46°F — a 26°F daily swing. Over 55 years of records, the warmest October 21st was in 2020 (70°F average), while the coldest was 1987 (44°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 20% of October 21st dates historically, with the wettest October 21st recording 2.54" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for October 21st in Chattanooga, TN? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 45° | 59° | 0.61" | — |
| 2024 | 79° | 45° | 62° | — | — |
| 2023 | 80° | 44° | 62° | — | — |
| 2022 | 72° | 34° | 53° | — | — |
| 2021 | 78° | 57° | 68° | 2.54" | — |
| 2020warmest | 83° | 57° | 70° | — | — |
| 2019 | 74° | 55° | 64° | 0.99" | — |
| 2018 | 58° | 39° | 48° | — | — |
| 2017 | 78° | 49° | 63° | — | — |
| 2016 | 69° | 51° | 60° | — | — |
| 2015 | 75° | 44° | 60° | — | — |
| 2014 | 73° | 48° | 61° | — | — |
| 2013 | 71° | 38° | 54° | — | — |
| 2012 | 74° | 44° | 59° | — | — |
| 2011 | 64° | 39° | 52° | — | — |
| 2010 | 80° | 44° | 62° | — | — |
| 2009 | 69° | 41° | 55° | — | — |
| 2008 | 75° | 44° | 60° | — | — |
| 2007 | 82° | 45° | 63° | — | — |
| 2006 | 67° | 38° | 52° | 0.03" | — |
| 2005 | 82° | 55° | 69° | — | — |
| 2004 | 78° | 61° | 69° | — | — |
| 2003 | 81° | 50° | 65° | — | — |
| 2002 | 70° | 57° | 63° | 0.41" | — |
| 2001 | 79° | 47° | 63° | — | — |
| 2000 | 79° | 56° | 67° | — | — |
| 1999 | 68° | 39° | 54° | — | — |
| 1998 | 75° | 57° | 66° | — | — |
| 1997 | 61° | 44° | 52° | 0.43" | — |
| 1996 | 69° | 41° | 55° | — | — |
| 1995 | 64° | 37° | 51° | — | — |
| 1994 | 77° | 53° | 65° | — | — |
| 1993 | 74° | 53° | 63° | 0.33" | — |
| 1992 | 76° | 44° | 60° | — | — |
| 1991 | 73° | 48° | 61° | — | — |
| 1990 | 77° | 44° | 61° | — | — |
| 1989 | 66° | 31° | 48° | — | — |
| 1988 | 60° | 46° | 53° | 0.51" | — |
| 1987coldest | 55° | 33° | 44° | — | — |
| 1986 | 71° | 40° | 55° | — | — |
| 1985 | 72° | 63° | 67° | 1.19" | — |
| 1984 | 73° | 65° | 69° | 0.3" | — |
| 1983 | 69° | 58° | 63° | — | — |
| 1982 | 64° | 45° | 54° | — | — |
| 1981 | 74° | 36° | 55° | — | — |
| 1980 | 71° | 38° | 54° | — | — |
| 1979 | 81° | 58° | 69° | — | — |
| 1978 | 80° | 41° | 61° | — | — |
| 1977 | 72° | 39° | 55° | — | — |
| 1976 | 62° | 36° | 49° | — | — |
| 1975 | 73° | 37° | 55° | — | — |
| 1974 | 58° | 34° | 46° | — | — |
| 1973 | 78° | 42° | 60° | — | — |
| 1972 | 62° | 30° | 46° | — | — |
| 1971 | 71° | 63° | 67° | 0.1" | — |
55 years of data from CHATTANOOGA AP