When to go
The Best Time to Visit Charleston
Month-by-month climate data for Charleston, United States — daily highs and lows, rain days, and an honest verdict for every month of the year.
March–May, September–November. Mild and humid-light shoulder months; June–August is hot and storm-prone.
Warmest in Charleston: Jul (31°C / 88°F) · Coolest: Jan (15°C / 59°F) · Wettest: Aug (~20 rain days)
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)
Charleston climate, month by month
January
15° / 7°C
~11 rain days
Good
February
17° / 9°C
~9 rain days
Excellent
March
20° / 12°C
~10 rain days
Excellent
April
23° / 15°C
~7 rain days
Excellent
May
26° / 19°C
~11 rain days
Excellent
June
29° / 23°C
~17 rain days
Good
July
31° / 25°C
~18 rain days
Fair
August
30° / 24°C
~20 rain days
Fair
September
28° / 21°C
~13 rain days
Excellent
October
24° / 17°C
~6 rain days
Excellent
November
20° / 12°C
~9 rain days
Excellent
December
16° / 8°C
~9 rain days
Good
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