Weather on May 21
Chattanooga, TN
55 Years of Data
Avg High
81°F
Avg Low
59°F
Warmest
2022
80°F avg
Coldest
2002
54°F avg
About This Date
May 21st in Chattanooga, TN typically brings warm spring weather, with average highs around 81°F and lows near 59°F. Over 55 years of records, the warmest May 21st was in 2022 (80°F average), while the coldest was 2002 (54°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 29% of May 21st dates historically, with the wettest May 21st recording 3.63" of rain. The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Chattanooga, TN? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 64° | 73° | — | — |
| 2024 | 88° | 66° | 77° | — | — |
| 2023 | 79° | 61° | 70° | — | — |
| 2022warmest | 90° | 70° | 80° | — | — |
| 2021 | 87° | 58° | 72° | — | — |
| 2020 | 76° | 57° | 66° | — | — |
| 2019 | 89° | 60° | 75° | — | — |
| 2018 | 86° | 67° | 76° | — | — |
| 2017 | 83° | 68° | 75° | 0.08" | — |
| 2016 | 79° | 61° | 70° | — | — |
| 2015 | 70° | 55° | 62° | — | — |
| 2014 | 88° | 59° | 73° | — | — |
| 2013 | 89° | 62° | 76° | — | — |
| 2012 | 82° | 61° | 71° | 0.58" | — |
| 2011 | 89° | 59° | 74° | — | — |
| 2010 | 77° | 65° | 71° | 0.36" | — |
| 2009 | 84° | 55° | 70° | — | — |
| 2008 | 76° | 54° | 65° | — | — |
| 2007 | 87° | 49° | 68° | — | — |
| 2006 | 82° | 66° | 74° | 0.86" | — |
| 2005 | 79° | 58° | 68° | — | — |
| 2004 | 90° | 66° | 78° | — | — |
| 2003 | 68° | 63° | 65° | 1.93" | — |
| 2002coldest | 66° | 43° | 54° | — | — |
| 2001 | 86° | 69° | 78° | 0.1" | — |
| 2000 | 83° | 66° | 74° | 0.2" | — |
| 1999 | 85° | 56° | 70° | — | — |
| 1998 | 91° | 66° | 79° | 0.13" | — |
| 1997 | 73° | 52° | 62° | — | — |
| 1996 | 89° | 64° | 77° | — | — |
| 1995 | 81° | 52° | 66° | — | — |
| 1994 | 76° | 48° | 62° | — | — |
| 1993 | 68° | 45° | 56° | — | — |
| 1992 | 80° | 60° | 70° | 0.05" | — |
| 1991 | 79° | 63° | 71° | 0.13" | — |
| 1990 | 78° | 63° | 70° | 0.46" | — |
| 1989 | 86° | 60° | 73° | — | — |
| 1988 | 86° | 54° | 70° | — | — |
| 1987 | 82° | 67° | 74° | 3.63" | — |
| 1986 | 72° | 48° | 60° | — | — |
| 1985 | 85° | 63° | 74° | 0.36" | — |
| 1984 | 78° | 63° | 70° | 1.6" | — |
| 1983 | 81° | 62° | 71° | 0.38" | — |
| 1982 | 86° | 58° | 72° | — | — |
| 1981 | 76° | 50° | 63° | — | — |
| 1980 | 77° | 53° | 65° | — | — |
| 1979 | 80° | 67° | 73° | 2.79" | — |
| 1978 | 88° | 62° | 75° | — | — |
| 1977 | 85° | 60° | 72° | — | — |
| 1976 | 81° | 47° | 64° | — | — |
| 1975 | 85° | 60° | 72° | — | — |
| 1974 | 76° | 62° | 69° | — | — |
| 1973 | 77° | 48° | 63° | — | — |
| 1972 | 77° | 50° | 64° | — | — |
| 1971 | 80° | 50° | 65° | — | — |
55 years of data from CHATTANOOGA AP