Weather on August 18
Charleston, SC
55 Years of Data
Avg High
88°F
Avg Low
76°F
Warmest
1995
88°F avg
Coldest
1981
74°F avg
About This Date
August 18th in Charleston, SC typically brings warm summer weather, with average highs around 88°F and lows near 76°F. Over 55 years of records, the warmest August 18th was in 1995 (88°F average), while the coldest was 1981 (74°F) — a 14°F range across recorded history. Rain or other precipitation has occurred on about 42% of August 18th dates historically, with the wettest August 18th recording 6.5" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for August 18th in Charleston, SC? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 76° | 82° | — | — |
| 2024 | 87° | 79° | 83° | — | — |
| 2023 | 91° | 78° | 85° | — | — |
| 2022 | 82° | 73° | 78° | 0.18" | — |
| 2021 | 88° | 78° | 83° | 1.09" | — |
| 2020 | 89° | 74° | 81° | 1.45" | — |
| 2019 | 84° | 76° | 80° | — | — |
| 2018 | 86° | 73° | 80° | 0.13" | — |
| 2017 | 92° | 82° | 87° | — | — |
| 2016 | 90° | 75° | 82° | — | — |
| 2015 | 84° | 75° | 80° | 6.5" | — |
| 2014 | 90° | 75° | 82° | 0.41" | — |
| 2013 | 83° | 74° | 78° | 0.84" | — |
| 2012 | 90° | 76° | 83° | — | — |
| 2011 | 87° | 77° | 82° | 0.03" | — |
| 2010 | 90° | 80° | 85° | 0.61" | — |
| 2009 | 84° | 80° | 82° | — | — |
| 2008 | 83° | 72° | 77° | — | — |
| 2007 | 87° | 80° | 84° | — | — |
| 2006 | 85° | 76° | 80° | — | — |
| 2005 | 88° | 76° | 82° | 0.58" | — |
| 2004 | 83° | 74° | 78° | 1.12" | — |
| 2003 | 88° | 75° | 81° | 3.25" | — |
| 2002 | 87° | 79° | 83° | 0.15" | — |
| 2001 | 92° | 75° | 83° | 1.37" | — |
| 2000 | 90° | — | — | — | — |
| 1999 | 93° | 81° | 87° | — | — |
| 1998 | 91° | 82° | 87° | — | — |
| 1997 | 94° | 80° | 87° | — | — |
| 1996 | 86° | 76° | 81° | — | — |
| 1995warmest | 97° | 80° | 88° | 0.41" | — |
| 1994 | 87° | 77° | 82° | 0.13" | — |
| 1993 | 88° | 79° | 83° | — | — |
| 1992 | 82° | 74° | 78° | 0.03" | — |
| 1991 | 92° | 77° | 84° | 0.03" | — |
| 1990 | 87° | 76° | 81° | — | — |
| 1989 | 83° | 73° | 78° | — | — |
| 1988 | 91° | 76° | 83° | — | — |
| 1987 | 93° | 78° | 86° | — | — |
| 1986 | 85° | 78° | 81° | — | — |
| 1985 | 92° | 76° | 84° | 1.35" | — |
| 1984 | 86° | 74° | 80° | — | — |
| 1983 | 90° | 72° | 81° | — | — |
| 1982 | 80° | 74° | 77° | 0.61" | — |
| 1981coldest | 76° | 72° | 74° | 1.12" | — |
| 1980 | 87° | 71° | 79° | — | — |
| 1979 | 83° | 67° | 75° | — | — |
| 1978 | 90° | 78° | 84° | — | — |
| 1977 | 90° | 74° | 82° | 3.28" | — |
| 1976 | 84° | 69° | 77° | — | — |
| 1975 | 96° | 78° | 87° | — | — |
| 1974 | 89° | 73° | 81° | — | — |
| 1973 | 91° | 75° | 83° | 3.1" | — |
| 1972 | 89° | 75° | 82° | — | — |
| 1971 | 89° | 72° | 80° | — | — |
55 years of data from DWTN CHARLESTON