Charleston Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Charleston year round climate
Spring (March–May): Average 16.5–23°C, mild and comfortable climate, moderate rainfall. Common activities: Outdoor walks, visiting historical sites. Recommended clothing: Light jacket, long-sleeved shirts, comfortable shoes.
Summer (June–August): Average 26.1–28.1°C, hot and humid, more rainfall, especially in August. Common activities: Beach activities, water sports. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
Autumn (September–November): Average 19.3–24.6°C, pleasant climate, less rainfall. Common activities: Outdoor activities, tasting local cuisine. Recommended clothing: Light jacket, long-sleeved or short-sleeved shirts.
Winter (December–February): Average 10.6–13.4°C, mild and humid, occasional rainfall. Common activities: Visiting indoor attractions, museum visits. Recommended clothing: Warm jacket, sweater, comfortable shoes.
Charleston climatological average
Annual average temperature: approx. 19.6°C / Annual rainfall: approx. 1357 mm / Summer humidity: 70%–80% / Rainiest month: August
Charleston monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
10.6°C
77.3
February
13.4°C
93.4
March
16.5°C
132.5
April
19.1°C
102.9
May
23°C
94.5
June
26.1°C
111.2
July
28.1°C
171.2
August
27.3°C
215.1
September
24.6°C
144.8
October
19.3°C
27.2
November
16.2°C
57
December
11.4°C
130
Charleston weather for the next seven days
6/17
Wednesday
Moderate rain
30.1°C/24°C
6/18
Thursday
Patchy rain nearby
32°C/23.8°C
6/19
Friday
Moderate rain
29.8°C/22.7°C
6/20
Saturday
Moderate rain
31.2°C/23.2°C
6/21
Sunday
Patchy rain nearby
31.5°C/23°C
6/22
Monday
Patchy rain nearby
33.7°C/25.2°C
6/23
Tuesday
Patchy rain nearby
27.7°C/23°C
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