Weather on May 18
Charleston, SC
55 Years of Data
Avg High
80°F
Avg Low
67°F
Warmest
1991
82°F avg
Coldest
2009
57°F avg
About This Date
May 18th in Charleston, SC typically brings warm spring weather, with average highs around 80°F and lows near 67°F. Over 55 years of records, the warmest May 18th was in 1991 (82°F average), while the coldest was 2009 (57°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 29% of May 18th dates historically, with the wettest May 18th recording 4.27" 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 May 18th in Charleston, SC? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 73° | 80° | — | — |
| 2024 | 77° | 72° | 74° | 0.43" | — |
| 2023 | 75° | 70° | 72° | 0.51" | — |
| 2022 | 82° | 70° | 76° | — | — |
| 2021 | 80° | 70° | 75° | — | — |
| 2020 | 81° | 71° | 76° | — | — |
| 2019 | 82° | 74° | 78° | — | — |
| 2018 | 76° | 73° | 74° | 0.3" | — |
| 2017 | 79° | 75° | 77° | — | — |
| 2016 | 80° | 69° | 75° | 0.03" | — |
| 2015 | 80° | 71° | 76° | — | — |
| 2014 | 74° | 63° | 68° | — | — |
| 2013 | 79° | 71° | 75° | — | — |
| 2012 | 74° | 67° | 70° | — | — |
| 2011 | 76° | 57° | 66° | — | — |
| 2010 | 87° | 71° | 79° | — | — |
| 2009coldest | 63° | 52° | 57° | 0.41" | — |
| 2008 | 79° | 64° | 71° | — | — |
| 2007 | 76° | 63° | 69° | 0.1" | — |
| 2006 | 80° | 62° | 71° | — | — |
| 2005 | 76° | 68° | 72° | — | — |
| 2004 | 78° | 70° | 74° | 0.03" | — |
| 2003 | 77° | 69° | 73° | 4.27" | — |
| 2002 | 82° | 62° | 72° | 1.37" | — |
| 2001 | 86° | 71° | 79° | — | — |
| 2000 | 85° | 72° | 78° | — | — |
| 1999 | 79° | 66° | 72° | — | — |
| 1998 | 83° | 74° | 78° | — | — |
| 1997 | 82° | 68° | 75° | — | — |
| 1996 | 92° | 73° | 82° | — | — |
| 1995 | 86° | 76° | 81° | — | — |
| 1994 | 71° | 60° | 66° | — | — |
| 1993 | 86° | 73° | 80° | 0.41" | — |
| 1992 | 76° | 66° | 71° | — | — |
| 1991warmest | 86° | 77° | 82° | — | — |
| 1990 | 82° | 68° | 75° | — | — |
| 1989 | 76° | 65° | 70° | — | — |
| 1988 | 79° | 67° | 73° | 0.05" | — |
| 1987 | 78° | 70° | 74° | — | — |
| 1986 | 76° | 71° | 73° | — | — |
| 1985 | 81° | 60° | 70° | — | — |
| 1984 | 76° | 60° | 68° | — | — |
| 1983 | 73° | 63° | 68° | — | — |
| 1982 | 81° | 66° | 73° | — | — |
| 1981 | 84° | 69° | 77° | 0.1" | — |
| 1980 | 87° | 73° | 80° | 0.36" | — |
| 1979 | 74° | 56° | 65° | — | — |
| 1978 | 74° | 64° | 69° | 1.22" | — |
| 1977 | 93° | 69° | 81° | — | — |
| 1976 | 82° | 61° | 71° | 1.02" | — |
| 1975 | 84° | 70° | 77° | 0.81" | — |
| 1974 | 83° | 71° | 77° | — | — |
| 1973 | 69° | 55° | 62° | — | — |
| 1972 | 80° | 65° | 72° | — | — |
| 1971 | 88° | 66° | 77° | — | — |
55 years of data from DWTN CHARLESTON