Weather on August 18
Chattanooga, TN
55 Years of Data
About This Date
August 18th in Chattanooga, TN typically brings hot summer weather, with average highs around 90°F and lows near 69°F. Over 55 years of records, the warmest August 18th was in 1993 (87°F average), while the coldest was 1981 (70°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 33% of August 18th dates historically, with the wettest August 18th recording 2.72" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 18th in Chattanooga, TN? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 72° | 83° | — | — |
| 2024 | 93° | 71° | 82° | — | — |
| 2023 | 89° | 67° | 78° | — | — |
| 2022 | 89° | 66° | 78° | — | — |
| 2021 | 90° | 68° | 79° | 0.76" | — |
| 2020 | 93° | 68° | 81° | — | — |
| 2019 | 98° | 70° | 84° | — | — |
| 2018 | 86° | 72° | 79° | — | — |
| 2017 | 90° | 74° | 82° | — | — |
| 2016 | 91° | 73° | 82° | 0.13" | — |
| 2015 | 86° | 71° | 79° | 2.06" | — |
| 2014 | 86° | 70° | 78° | 2.72" | — |
| 2013 | 77° | 67° | 72° | 1.07" | — |
| 2012 | 85° | 70° | 77° | — | — |
| 2011 | 96° | 69° | 83° | — | — |
| 2010 | 93° | 77° | 85° | 0.08" | — |
| 2009 | 89° | 72° | 80° | — | — |
| 2008 | 92° | 66° | 79° | — | — |
| 2007 | 100° | 72° | 86° | — | — |
| 2006 | 93° | 73° | 83° | — | — |
| 2005 | 92° | 72° | 82° | — | — |
| 2004 | 89° | 63° | 76° | — | — |
| 2003 | 90° | 71° | 80° | — | — |
| 2002 | 92° | 71° | 81° | 0.08" | — |
| 2001 | 86° | 65° | 75° | — | — |
| 2000 | 98° | 73° | 86° | — | — |
| 1999 | 101° | 70° | 85° | — | — |
| 1998 | 90° | 71° | 80° | — | — |
| 1997 | 91° | 75° | 83° | — | — |
| 1996 | 90° | 67° | 78° | — | — |
| 1995 | 97° | 73° | 85° | — | — |
| 1994 | 88° | 66° | 77° | — | — |
| 1993warmest | 98° | 76° | 87° | — | — |
| 1992 | 83° | 62° | 72° | — | — |
| 1991 | 89° | 72° | 80° | 1.4" | — |
| 1990 | 96° | 70° | 83° | 0.2" | — |
| 1989 | 87° | 66° | 77° | 1.02" | — |
| 1988 | 99° | 71° | 85° | — | — |
| 1987 | 90° | 70° | 80° | 1.7" | — |
| 1986 | 89° | 70° | 79° | — | — |
| 1985 | 87° | 67° | 77° | — | — |
| 1984 | 84° | 64° | 74° | 0.25" | — |
| 1983 | 95° | 68° | 82° | — | — |
| 1982 | 86° | 65° | 75° | 0.05" | — |
| 1981coldest | 74° | 66° | 70° | 0.58" | — |
| 1980 | 91° | 73° | 82° | 0.03" | — |
| 1979 | 87° | 64° | 76° | — | — |
| 1978 | 91° | 74° | 82° | — | — |
| 1977 | 87° | 69° | 78° | 0.2" | — |
| 1976 | 86° | 62° | 74° | — | — |
| 1975 | 87° | 67° | 77° | — | — |
| 1974 | 88° | 69° | 78° | 0.05" | — |
| 1973 | 88° | 70° | 79° | — | — |
| 1972 | 89° | 67° | 78° | — | — |
| 1971 | 83° | 70° | 76° | 0.15" | — |