Weather on December 18
Charleston, SC
55 Years of Data
Avg High
59°F
Avg Low
44°F
Warmest
2008
68°F avg
Coldest
1989
35°F avg
About This Date
December 18th 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 18th was in 2008 (68°F average), while the coldest was 1989 (35°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 29% of December 18th dates historically, with the wettest December 18th recording 9.7" of rain. The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Charleston, SC? Bring layers as temperatures can vary throughout the day.
Warming Trend
2.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 54° | 59° | 0.74" | — |
| 2024 | 67° | 57° | 62° | 0.03" | — |
| 2023 | 61° | 51° | 56° | — | — |
| 2022 | 55° | 42° | 49° | — | — |
| 2021 | 74° | 59° | 66° | — | — |
| 2020 | 53° | 38° | 45° | — | — |
| 2019 | 61° | 43° | 52° | — | — |
| 2018 | 59° | 46° | 53° | — | — |
| 2017 | 70° | 54° | 62° | — | — |
| 2016 | 70° | 62° | 66° | — | — |
| 2015 | 68° | 47° | 57° | 2.34" | — |
| 2014 | 65° | 46° | 55° | — | — |
| 2013 | 58° | 46° | 52° | — | — |
| 2012 | 68° | 53° | 61° | — | — |
| 2011 | 60° | 46° | 53° | — | — |
| 2010 | 53° | 39° | 46° | 2.18" | — |
| 2009 | 64° | 47° | 55° | 9.7" | — |
| 2008warmest | 78° | 58° | 68° | — | — |
| 2007 | 52° | 39° | 45° | — | — |
| 2006 | 73° | 55° | 64° | — | — |
| 2005 | 48° | 43° | 45° | 0.69" | — |
| 2004 | 58° | 46° | 52° | — | — |
| 2003 | 55° | 37° | 46° | — | — |
| 2002 | 56° | 49° | 52° | 0.13" | — |
| 2001 | 69° | 55° | 62° | 0.08" | — |
| 2000 | 51° | 30° | 41° | — | — |
| 1999 | 57° | 51° | 54° | 0.46" | — |
| 1998 | 52° | 39° | 45° | — | — |
| 1997 | 62° | 43° | 52° | — | — |
| 1996 | 61° | 45° | 53° | 0.76" | — |
| 1995 | 64° | 50° | 57° | 1.37" | — |
| 1994 | 60° | 49° | 54° | — | — |
| 1993 | 61° | 45° | 53° | — | — |
| 1992 | 61° | 51° | 56° | — | — |
| 1991 | 65° | 35° | 50° | — | — |
| 1990 | 72° | 58° | 65° | — | — |
| 1989coldest | 38° | 33° | 35° | 0.81" | — |
| 1988 | 45° | 30° | 37° | — | — |
| 1987 | 49° | 34° | 41° | — | — |
| 1986 | 62° | 51° | 57° | 0.1" | — |
| 1985 | 59° | 44° | 52° | — | — |
| 1984 | 75° | 52° | 63° | — | — |
| 1983 | 50° | 45° | 47° | 0.15" | — |
| 1982 | 49° | 36° | 42° | — | — |
| 1981 | 53° | 38° | 45° | 0.56" | — |
| 1980 | 60° | 40° | 50° | — | — |
| 1979 | 49° | 33° | 41° | — | — |
| 1978 | 59° | 38° | 48° | — | — |
| 1977 | 65° | 50° | 57° | 0.13" | — |
| 1976 | 60° | 48° | 54° | — | — |
| 1975 | 53° | 33° | 43° | — | — |
| 1974 | 48° | 30° | 39° | — | — |
| 1973 | 46° | 31° | 38° | — | — |
| 1972 | 53° | 32° | 43° | — | — |
| 1971 | 58° | 41° | 49° | — | — |
55 years of data from DWTN CHARLESTON