Weather on December 21
Charleston, SC
55 Years of Data
Avg High
59°F
Avg Low
44°F
Warmest
2011
64°F avg
Coldest
1980
33°F avg
About This Date
December 21st in Charleston, SC typically brings cool winter weather, with average highs around 59°F and lows near 44°F. Over 55 years of records, the warmest December 21st was in 2011 (64°F average), while the coldest was 1980 (33°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 24% of December 21st dates historically, with the wettest December 21st recording 3.23" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Charleston, SC? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 48° | 56° | — | — |
| 2024 | 54° | 43° | 48° | — | — |
| 2023 | 57° | 39° | 48° | — | — |
| 2022 | 50° | 41° | 46° | 0.69" | — |
| 2021 | 48° | 42° | 45° | 0.79" | — |
| 2020 | 62° | 50° | 56° | 0.3" | — |
| 2019 | 55° | 47° | 51° | — | — |
| 2018 | 65° | 50° | 57° | — | — |
| 2017 | 63° | 53° | 58° | 0.13" | — |
| 2016 | 58° | 40° | 49° | — | — |
| 2015 | 70° | 54° | 62° | — | — |
| 2014 | 55° | 45° | 50° | — | — |
| 2013 | 72° | 57° | 64° | — | — |
| 2012 | 59° | 44° | 52° | — | — |
| 2011warmest | 70° | 58° | 64° | — | — |
| 2010 | 58° | 38° | 48° | — | — |
| 2009 | 53° | 35° | 44° | — | — |
| 2008 | 64° | 46° | 55° | — | — |
| 2007 | 63° | 51° | 57° | 3.23" | — |
| 2006 | 67° | 55° | 61° | — | — |
| 2005 | 51° | 38° | 44° | — | — |
| 2004 | 56° | 37° | 46° | — | — |
| 2003 | 50° | 34° | 42° | — | — |
| 2002 | 60° | 44° | 52° | — | — |
| 2001 | 62° | 41° | 52° | — | — |
| 2000 | 52° | 32° | 42° | — | — |
| 1999 | 59° | 50° | 55° | — | — |
| 1998 | 68° | 57° | 63° | — | — |
| 1997 | 62° | 50° | 56° | — | — |
| 1996 | 50° | 33° | 42° | — | — |
| 1995 | 50° | 34° | 42° | — | — |
| 1994 | 57° | 50° | 54° | 0.08" | — |
| 1993 | 61° | 43° | 52° | 0.03" | — |
| 1992 | 63° | 48° | 55° | 0.15" | — |
| 1991 | 71° | 43° | 57° | — | — |
| 1990 | 66° | 53° | 60° | — | — |
| 1989 | 50° | 34° | 42° | — | — |
| 1988 | 73° | 50° | 62° | — | — |
| 1987 | 68° | 57° | 63° | — | — |
| 1986 | 52° | 42° | 47° | — | — |
| 1985 | 47° | 32° | 39° | — | — |
| 1984 | 72° | 54° | 63° | — | — |
| 1983 | 65° | 38° | 51° | 0.91" | — |
| 1982 | 59° | 42° | 51° | — | — |
| 1981 | 51° | 32° | 42° | — | — |
| 1980coldest | 36° | 30° | 33° | — | — |
| 1979 | 58° | 42° | 50° | — | — |
| 1978 | 66° | 50° | 58° | 0.05" | — |
| 1977 | 65° | 39° | 52° | 0.79" | — |
| 1976 | 46° | 32° | 39° | — | — |
| 1975 | 53° | 36° | 44° | — | — |
| 1974 | 56° | 47° | 51° | 0.53" | — |
| 1973 | 57° | 32° | 45° | — | — |
| 1972 | 67° | 52° | 59° | 1.52" | — |
| 1971 | 68° | 57° | 63° | — | — |
55 years of data from DWTN CHARLESTON