Weather on May 20
Charleston, SC
55 Years of Data
Avg High
80°F
Avg Low
68°F
Warmest
2025
82°F avg
Coldest
2002
61°F avg
About This Date
May 20th in Charleston, SC typically brings warm spring weather, with average highs around 80°F and lows near 68°F. Over 55 years of records, the warmest May 20th was in 2025 (82°F average), while the coldest was 2002 (61°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 25% of May 20th dates historically, with the wettest May 20th recording 7.47" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for May 20th in Charleston, SC? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 88° | 77° | 82° | — | — |
| 2024 | 78° | 68° | 73° | — | — |
| 2023 | 77° | 67° | 72° | — | — |
| 2022 | 87° | 76° | 81° | — | — |
| 2021 | 82° | 70° | 76° | — | — |
| 2020 | 78° | 67° | 72° | 7.47" | — |
| 2019 | 81° | 74° | 77° | — | — |
| 2018 | 79° | 74° | 76° | — | — |
| 2017 | 82° | 74° | 78° | — | — |
| 2016 | 75° | 69° | 72° | 0.03" | — |
| 2015 | 83° | 68° | 75° | 3.12" | — |
| 2014 | 74° | 64° | 69° | — | — |
| 2013 | 78° | 74° | 76° | 0.23" | — |
| 2012 | 77° | 63° | 70° | 0.05" | — |
| 2011 | 81° | 69° | 75° | — | — |
| 2010 | 76° | 68° | 72° | — | — |
| 2009 | 74° | 61° | 67° | — | — |
| 2008 | 85° | 68° | 76° | 0.89" | — |
| 2007 | 76° | 62° | 69° | — | — |
| 2006 | 81° | 69° | 75° | — | — |
| 2005 | 78° | 68° | 73° | 0.66" | — |
| 2004 | 81° | 73° | 77° | — | — |
| 2003 | 76° | 61° | 68° | — | — |
| 2002coldest | 68° | 54° | 61° | — | — |
| 2001 | 88° | 73° | 80° | — | — |
| 2000 | 85° | 74° | 79° | — | — |
| 1999 | 75° | 67° | 71° | — | — |
| 1998 | 89° | 72° | 80° | — | — |
| 1997 | 86° | 74° | 80° | — | — |
| 1996 | 83° | 74° | 78° | — | — |
| 1995 | 76° | 65° | 70° | — | — |
| 1994 | 68° | 55° | 62° | — | — |
| 1993 | 81° | 65° | 73° | — | — |
| 1992 | 78° | 64° | 71° | — | — |
| 1991 | 75° | 65° | 70° | 4.14" | — |
| 1990 | 87° | 75° | 81° | — | — |
| 1989 | 82° | 64° | 73° | — | — |
| 1988 | 81° | 71° | 76° | — | — |
| 1987 | 81° | 72° | 76° | 0.43" | — |
| 1986 | 77° | 71° | 74° | 0.05" | — |
| 1985 | 81° | 71° | 76° | — | — |
| 1984 | 84° | 67° | 75° | — | — |
| 1983 | 81° | 70° | 75° | — | — |
| 1982 | 81° | 70° | 75° | — | — |
| 1981 | 81° | 59° | 70° | 1.96" | — |
| 1980 | 82° | 70° | 76° | 0.23" | — |
| 1979 | 76° | 63° | 69° | 0.1" | — |
| 1978 | 82° | 67° | 74° | — | — |
| 1977 | 82° | 71° | 77° | — | — |
| 1976 | 82° | 59° | 71° | — | — |
| 1975 | 84° | 71° | 78° | — | — |
| 1974 | 75° | 68° | 72° | 0.03" | — |
| 1973 | 81° | 69° | 75° | — | — |
| 1972 | 73° | 60° | 67° | — | — |
| 1971 | 87° | 69° | 78° | — | — |
55 years of data from DWTN CHARLESTON