Weather on August 21
Chattanooga, TN
55 Years of Data
Avg High
89°F
Avg Low
69°F
Warmest
1983
88°F avg
Coldest
1992
70°F avg
About This Date
August 21st in Chattanooga, TN typically brings warm summer weather, with average highs around 89°F and lows near 69°F. Over 55 years of records, the warmest August 21st was in 1983 (88°F average), while the coldest was 1992 (70°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 21st dates historically, with the wettest August 21st recording 2.01" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Chattanooga, TN? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 72° | 80° | — | — |
| 2024 | 84° | 64° | 74° | — | — |
| 2023 | 95° | 72° | 83° | — | — |
| 2022 | 85° | 72° | 78° | 0.28" | — |
| 2021 | 84° | 73° | 79° | 1.57" | — |
| 2020 | 78° | 71° | 75° | 2.01" | — |
| 2019 | 95° | 73° | 84° | — | — |
| 2018 | 86° | 74° | 80° | 0.33" | — |
| 2017 | 92° | 70° | 81° | — | — |
| 2016 | 86° | 71° | 79° | 0.66" | — |
| 2015 | 86° | 68° | 77° | — | — |
| 2014 | 94° | 70° | 82° | — | — |
| 2013 | 82° | 72° | 77° | 1.4" | — |
| 2012 | 86° | 61° | 73° | — | — |
| 2011 | 99° | 72° | 85° | 0.03" | — |
| 2010 | 94° | 74° | 84° | 0.43" | — |
| 2009 | 84° | 71° | 78° | — | — |
| 2008 | 93° | 70° | 81° | — | — |
| 2007 | 100° | 74° | 87° | — | — |
| 2006 | 89° | 71° | 80° | 0.76" | — |
| 2005 | 94° | 76° | 85° | 0.46" | — |
| 2004 | 82° | 70° | 76° | — | — |
| 2003 | 90° | 73° | 81° | — | — |
| 2002 | 97° | 72° | 84° | — | — |
| 2001 | 86° | 60° | 73° | — | — |
| 2000 | 77° | 68° | 73° | — | — |
| 1999 | 90° | 65° | 77° | — | — |
| 1998 | 89° | 67° | 78° | — | — |
| 1997 | 83° | 65° | 74° | — | — |
| 1996 | 89° | 68° | 79° | — | — |
| 1995 | 90° | 75° | 82° | — | — |
| 1994 | 82° | 65° | 73° | 1.57" | — |
| 1993 | 97° | 72° | 84° | — | — |
| 1992coldest | 76° | 65° | 70° | 1.55" | — |
| 1991 | 86° | 59° | 73° | — | — |
| 1990 | 96° | 72° | 84° | — | — |
| 1989 | 92° | 70° | 81° | — | — |
| 1988 | 90° | 71° | 80° | — | — |
| 1987 | 96° | 62° | 79° | — | — |
| 1986 | 88° | 68° | 78° | — | — |
| 1985 | 85° | 68° | 76° | — | — |
| 1984 | 85° | 67° | 76° | — | — |
| 1983warmest | 103° | 74° | 88° | — | — |
| 1982 | 87° | 66° | 77° | 0.03" | — |
| 1981 | 79° | 67° | 73° | 0.1" | — |
| 1980 | 98° | 73° | 86° | — | — |
| 1979 | 93° | 73° | 83° | — | — |
| 1978 | 87° | 69° | 78° | — | — |
| 1977 | 90° | 65° | 77° | — | — |
| 1976 | 91° | 65° | 78° | — | — |
| 1975 | 89° | 66° | 78° | — | — |
| 1974 | 84° | 64° | 74° | — | — |
| 1973 | 84° | 63° | 73° | — | — |
| 1972 | 84° | 68° | 76° | — | — |
| 1971 | 91° | 68° | 80° | 0.03" | — |
55 years of data from CHATTANOOGA AP