Charleston Weather Year-Round — Best Time to Visit
Charleston, United States has mild weather year-round. The best time to visit is September (score: 89/100). Annual average high: 17.1°C, total rainfall: 1009mm.
When is the best time to visit Charleston?
89
September is the best month to visit Charleston with a travel score of 89/100 (Excellent).
Expect highs of 25.4°C, 7 rain days, and 10 hours of daily sunshine.
View September weather details →Travel Score by Month
46
Jan
53
Feb
60
Mar
69
Apr
78
May
83
Jun
83
Jul
87
Aug
89
Sep
75
Oct
60
Nov
48
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Charleston each month?
17.1°C
Avg High
7.9°C
Avg Low
1009mm
Annual Rain
How much rain does Charleston get?
Charleston receives 1009mm of rain annually. The wettest month is typically May with 112mm, while February is the driest.
What is the weather like each month in Charleston?
January
46
3°C
Low: -5°C
8 rain days
Mixed
February
53
5°C
Low: -4°C
7 rain days
Mixed
March
60
11°C
Low: 1°C
10 rain days
Good
April
69
18°C
Low: 7°C
11 rain days
Good
May
78
23°C
Low: 13°C
12 rain days
Good
June
83
28°C
Low: 18°C
11 rain days
Excellent
July
83
29°C
Low: 20°C
10 rain days
Excellent
August
87
29°C
Low: 20°C
8 rain days
Excellent
September
Best time to visit89
25°C
Low: 16°C
7 rain days
Excellent
October
75
19°C
Low: 10°C
8 rain days
Good
November
60
11°C
Low: 3°C
8 rain days
Good
December
48
5°C
Low: -2°C
8 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31