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.
Timing is the first real decision when planning Charleston— it drives crowds, prices and what's actually open. Here's how the year breaks down so you can pick dates that fit the trip you're building, not just the weather.
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
Plan around it
Dates locked in? Start from the Charleston travel guide or jump straight to a 3-day, 5-day or 7-day itinerary.