Weather on December 20
Charleston, SC
55 Years of Data
Avg High
59°F
Avg Low
45°F
Warmest
1978
68°F avg
Coldest
2000
32°F avg
About This Date
December 20th in Charleston, SC typically brings cool winter weather, with average highs around 59°F and lows near 45°F. Over 55 years of records, the warmest December 20th was in 1978 (68°F average), while the coldest was 2000 (32°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 29% of December 20th dates historically, with the wettest December 20th recording 3.25" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Charleston, SC? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 45° | 52° | — | — |
| 2024 | 64° | 51° | 58° | — | — |
| 2023 | 51° | 36° | 43° | — | — |
| 2022 | 50° | 41° | 46° | 0.97" | — |
| 2021 | 49° | 42° | 45° | 0.03" | — |
| 2020 | 58° | 51° | 54° | 0.76" | — |
| 2019 | 54° | 39° | 46° | — | — |
| 2018 | 67° | 57° | 62° | 2.13" | — |
| 2017 | 66° | 60° | 63° | 0.2" | — |
| 2016 | 44° | 39° | 42° | — | — |
| 2015 | 61° | 44° | 52° | — | — |
| 2014 | 55° | 51° | 53° | 0.2" | — |
| 2013 | 73° | 54° | 63° | — | — |
| 2012 | 69° | 51° | 60° | 0.69" | — |
| 2011 | 70° | 53° | 61° | — | — |
| 2010 | 50° | 33° | 42° | — | — |
| 2009 | 54° | 41° | 47° | — | — |
| 2008 | 69° | 60° | 65° | — | — |
| 2007 | 61° | 49° | 55° | — | — |
| 2006 | 61° | 55° | 58° | — | — |
| 2005 | 52° | 39° | 45° | — | — |
| 2004 | 39° | 29° | 34° | — | — |
| 2003 | 46° | 33° | 40° | — | — |
| 2002 | 66° | 50° | 58° | 0.3" | — |
| 2001 | 62° | 48° | 55° | — | — |
| 2000coldest | 40° | 25° | 32° | — | — |
| 1999 | 62° | 52° | 57° | — | — |
| 1998 | 74° | 58° | 66° | — | — |
| 1997 | 68° | 46° | 57° | — | — |
| 1996 | 41° | 26° | 34° | — | — |
| 1995 | 60° | 41° | 51° | — | — |
| 1994 | 58° | 45° | 51° | — | — |
| 1993 | 61° | 46° | 53° | 0.43" | — |
| 1992 | 74° | 53° | 63° | — | — |
| 1991 | 52° | 31° | 41° | — | — |
| 1990 | 63° | 53° | 58° | 1.12" | — |
| 1989 | 44° | 35° | 40° | 0.03" | — |
| 1988 | 59° | 41° | 50° | — | — |
| 1987 | 70° | 53° | 61° | — | — |
| 1986 | 57° | 48° | 53° | 0.05" | — |
| 1985 | 55° | 31° | 43° | — | — |
| 1984 | 75° | 55° | 65° | — | — |
| 1983 | 44° | 39° | 42° | — | — |
| 1982 | 57° | 40° | 48° | — | — |
| 1981 | 39° | 28° | 34° | — | — |
| 1980 | 54° | 35° | 44° | — | — |
| 1979 | 60° | 43° | 51° | — | — |
| 1978warmest | 73° | 62° | 68° | — | — |
| 1977 | 66° | 48° | 57° | — | — |
| 1976 | 58° | 46° | 52° | 0.61" | — |
| 1975 | 55° | 35° | 45° | — | — |
| 1974 | 64° | 53° | 59° | 1.65" | — |
| 1973 | 69° | 49° | 59° | 3.25" | — |
| 1972 | 68° | 54° | 61° | — | — |
| 1971 | 66° | 59° | 63° | 2.06" | — |
55 years of data from DWTN CHARLESTON