Weather on June 21
Charleston, SC
55 Years of Data
Avg High
86°F
Avg Low
75°F
Warmest
1990
89°F avg
Coldest
1999
73°F avg
About This Date
June 21st in Charleston, SC typically brings warm summer weather, with average highs around 86°F and lows near 75°F. Over 55 years of records, the warmest June 21st was in 1990 (89°F average), while the coldest was 1999 (73°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 38% of June 21st dates historically, with the wettest June 21st recording 5.64" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for June 21st 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 | 86° | 79° | 82° | — | — |
| 2024 | 83° | 75° | 79° | 1.65" | — |
| 2023 | 84° | 72° | 78° | 0.48" | — |
| 2022 | 85° | 77° | 81° | — | — |
| 2021 | 90° | 77° | 83° | 0.03" | — |
| 2020 | 86° | 74° | 80° | — | — |
| 2019 | 93° | 75° | 84° | — | — |
| 2018 | 96° | 80° | 88° | — | — |
| 2017 | 81° | 73° | 77° | 5.64" | — |
| 2016 | 82° | 72° | 77° | — | — |
| 2015 | 92° | 82° | 87° | — | — |
| 2014 | 86° | 79° | 82° | — | — |
| 2013 | 81° | 71° | 76° | — | — |
| 2012 | 83° | 75° | 79° | — | — |
| 2011 | 98° | 81° | 89° | — | — |
| 2010 | 88° | 77° | 82° | 3.94" | — |
| 2009 | 94° | 81° | 87° | — | — |
| 2008 | 86° | 71° | 79° | 4.57" | — |
| 2007 | 80° | 72° | 76° | 0.23" | — |
| 2006 | 86° | 77° | 82° | — | — |
| 2005 | 77° | 69° | 73° | — | — |
| 2004 | 81° | 78° | 79° | — | — |
| 2003 | 81° | 69° | 75° | — | — |
| 2002 | 77° | 71° | 74° | 0.84" | — |
| 2001 | 87° | 72° | 79° | 0.64" | — |
| 2000 | 86° | 78° | 82° | — | — |
| 1999coldest | 78° | 68° | 73° | — | — |
| 1998 | 93° | 79° | 86° | — | — |
| 1997 | 83° | 76° | 79° | — | — |
| 1996 | 86° | 76° | 81° | — | — |
| 1995 | 78° | 71° | 75° | — | — |
| 1994 | 95° | 77° | 86° | 1.47" | — |
| 1993 | 85° | 78° | 81° | 0.05" | — |
| 1992 | 90° | 73° | 81° | — | — |
| 1991 | 90° | 80° | 85° | 1.32" | — |
| 1990warmest | 99° | 80° | 89° | — | — |
| 1989 | 83° | 74° | 78° | 0.23" | — |
| 1988 | 84° | 72° | 78° | — | — |
| 1987 | 86° | 78° | 82° | — | — |
| 1986 | 82° | 75° | 79° | 0.15" | — |
| 1985 | 89° | 73° | 81° | — | — |
| 1984 | 87° | 72° | 79° | 0.43" | — |
| 1983 | 82° | 74° | 78° | — | — |
| 1982 | 89° | 78° | 84° | — | — |
| 1981 | 95° | 80° | 88° | — | — |
| 1980 | 80° | 73° | 77° | 0.15" | — |
| 1979 | 81° | 68° | 74° | — | — |
| 1978 | 88° | 75° | 81° | — | — |
| 1977 | 96° | 74° | 85° | — | — |
| 1976 | 80° | 70° | 75° | 2.62" | — |
| 1975 | 85° | 73° | 79° | — | — |
| 1974 | 88° | 75° | 81° | 0.23" | — |
| 1973 | 87° | 76° | 81° | 0.91" | — |
| 1972 | 92° | 70° | 81° | 0.13" | — |
| 1971 | 87° | 73° | 80° | 2.13" | — |
55 years of data from DWTN CHARLESTON