Charleston, SC: Climate and Weather (2024)

Seasonal Weather Patterns in Charleston, SC

Temperature

Average Daily Temperature (°F)

	Charleston, SC	U.S. Avg.	Difference
January	54	43	+11
July	84	79	+5

Average Monthly Number of Hot and Freezing Days

	Charleston, SC	U.S. Avg.	Difference
Summer: Hot Days	10	11	-1
Winter: Freezing Days	5	12	-7

Read more in Temperature

Sunshine

Average Annual Number of Clear and Cloudy Days

	Charleston, SC	U.S. Avg.	Difference
Clear Days	162	217	-55
Cloudy Days	203	148	+55

Average Daylight Hours per Day

	Charleston, SC	U.S. Avg.	Difference
January	11	10	+1
July	15	15	No difference

Read more in Sunshine

Precipitation

Average Annual Number of Rainy and Snow Days

	Charleston, SC	U.S. Avg.	Difference
Rainy Days	110	117	-7
Snow Days	0	7	-7

Average Monthly Humidity (%) in Charleston, SC

	Charleston, SC	U.S. Avg.	Difference
January	70	68	+2%
July	76	61	+15%

Read more in Precipitation

Is Charleston, SC, Hot or Cold?

Low, Average, and High Temperatures (°F)

	Low	Average	High
January	42	54	58
February	46	55	61
March	52	62	68
April	57	64	75
May	68	75	82
June	73	81	85
July	76	84	88
August	76	84	86
September	72	79	83
October	60	67	76
November	52	58	67
December	46	53	62

Average Monthly Number of Hot Days

	Charleston, SC	U.S. Avg.	Difference
January	0	0	No difference
February	0	0	No difference
March	0	0	No difference
April	0	1	-1
May	2	3	-1
June	8	8	No difference
July	13	13	No difference
August	10	12	-2
September	4	6	-2
October	0	2	-2
November	0	0	No difference
December	0	0	No difference

Average Monthly Number of Freezing Days

	Charleston, SC	U.S. Avg.	Difference
January	6	13	-7
February	4	10	-6
March	1	7	-6
April	0	2	-2
May	0	0	No difference
June	0	0	No difference
July	0	0	No difference
August	0	0	No difference
September	0	0	No difference
October	0	2	-2
November	1	6	-5
December	4	12	-8

Charleston, SC: Clear/Cloudy Skies, and Daylight Hours

Average Number of Clear Days

	Charleston, SC	U.S. Avg.	Difference
January	15	17	-2
February	13	16	-3
March	14	17	-3
April	14	17	-3
May	14	18	-4
June	11	19	-8
July	12	20	-8
August	10	20	-10
September	13	19	-6
October	17	19	-2
November	15	18	-3
December	14	17	-3

Average Number of Cloudy Days

	Charleston, SC	U.S. Avg.	Difference
January	16	14	+2
February	15	12	+3
March	17	14	+3
April	16	13	+3
May	17	13	+4
June	19	11	+8
July	19	11	+8
August	21	11	+10
September	17	11	+6
October	14	12	+2
November	15	12	+3
December	17	14	+3

Average Daylight Hours per Day

	Charleston, SC	U.S. Avg.	Difference
January	11	10	+1
February	11	11	No difference
March	12	12	No difference
April	13	13	No difference
May	14	14	No difference
June	15	15	No difference
July	15	15	No difference
August	14	14	No difference
September	13	13	No difference
October	12	12	No difference
November	11	10	+1
December	10	10	No difference

Charleston, SC: Rainy Days, Snow Days, and Humidity

Average Number of Rainy Days

	Charleston, SC	U.S. Avg.	Difference
January	10	9	+1
February	10	8	+2
March	10	9	+1
April	9	7	+2
May	9	7	+2
June	10	7	+3
July	9	7	+2
August	9	6	+3
September	8	7	+1
October	9	7	+2
November	9	8	+1
December	8	8	No difference

Average Number of Snow Days

	Charleston, SC	U.S. Avg.	Difference
January	0	2	-2
February	0	2	-2
March	0	1	-1
April	0	0	No difference
May	0	0	No difference
June	0	0	No difference
July	0	0	No difference
August	0	0	No difference
September	0	0	No difference
October	0	0	No difference
November	0	1	-1
December	0	2	-2

Average Humidity (%)

	Charleston, SC	U.S. Avg.	Difference
January	70	68	+2%
February	68	66	+2%
March	68	63	+5%
April	67	59	+8%
May	70	61	+9%
June	75	60	+15%
July	76	61	+15%
August	77	62	+15%
September	77	63	+14%
October	73	63	+10%
November	71	65	+6%
December	71	68	+3%

The assessments presented on this website, including those related to crime, safety, cost of living, and other location characteristics (e.g., states, cities, towns, villages, neighborhoods, areas, landmarks), are based on various sources and our internal research methods. These assessments are not guaranteed to be accurate or complete and should not be used as the sole basis for making any decisions.