Charleston weather by month

Check out Charleston weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Charleston (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
14°C maximum daytime temperature in January in Charleston14
15°C maximum daytime temperature in February in Charleston15
19°C maximum daytime temperature in March in Charleston19
23°C maximum daytime temperature in April in Charleston23
27°C maximum daytime temperature in May in Charleston27
30°C maximum daytime temperature in June in Charleston30
31°C maximum daytime temperature in July in Charleston31
31°C maximum daytime temperature in August in Charleston31
28°C maximum daytime temperature in September in Charleston28
24°C maximum daytime temperature in October in Charleston24
20°C maximum daytime temperature in November in Charleston20
16°C maximum daytime temperature in December in Charleston16
Min temperature (night-time)
5°C minimum night-time temperature in January in Charleston5
6°C minimum night-time temperature in February in Charleston6
10°C minimum night-time temperature in March in Charleston10
14°C minimum night-time temperature in April in Charleston14
19°C minimum night-time temperature in May in Charleston19
22°C minimum night-time temperature in June in Charleston22
24°C minimum night-time temperature in July in Charleston24
24°C minimum night-time temperature in August in Charleston24
21°C minimum night-time temperature in September in Charleston21
15°C minimum night-time temperature in October in Charleston15
11°C minimum night-time temperature in November in Charleston11
7°C minimum night-time temperature in December in Charleston7
Heat & Humidity
No heat & humidity in January in Charleston0
No heat & humidity in February in Charleston0
No heat & humidity in March in Charleston0
No heat & humidity in April in Charleston0
Moderate heat & humidity in May in CharlestonM
High heat & humidity in June in CharlestonH
Very high heat & humidity in July in CharlestonVH
Very high heat & humidity in August in CharlestonVH
Moderate heat & humidity in September in CharlestonM
No heat & humidity in October in Charleston0
No heat & humidity in November in Charleston0
No heat & humidity in December in Charleston0
Sea temperature
18°C sea temperature in January in Charleston18
18°C sea temperature in February in Charleston18
17°C sea temperature in March in Charleston17
18°C sea temperature in April in Charleston18
22°C sea temperature in May in Charleston22
26°C sea temperature in June in Charleston26
28°C sea temperature in July in Charleston28
28°C sea temperature in August in Charleston28
27°C sea temperature in September in Charleston27
23°C sea temperature in October in Charleston23
20°C sea temperature in November in Charleston20
19°C sea temperature in December in Charleston19

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Charleston

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Charleston10
11 hours of daylight per day in February in Charleston11
12 hours of daylight per day in March in Charleston12
13 hours of daylight per day in April in Charleston13
14 hours of daylight per day in May in Charleston14
14 hours of daylight per day in June in Charleston14
14 hours of daylight per day in July in Charleston14
13 hours of daylight per day in August in Charleston13
12 hours of daylight per day in September in Charleston12
11 hours of daylight per day in October in Charleston11
10 hours of daylight per day in November in Charleston10
10 hours of daylight per day in December in Charleston10
UV Index (Maximum)
UV (maximum) index 3 (Moderate) in January in Charleston3
UV (maximum) index 5 (Moderate) in February in Charleston5
UV (maximum) index 7 (High) in March in Charleston7
UV (maximum) index 9 (Very High) in April in Charleston9
UV (maximum) index 9 (Very High) in May in Charleston9
UV (maximum) index 10 (Very High) in June in Charleston10
UV (maximum) index 10 (Very High) in July in Charleston10
UV (maximum) index 10 (Very High) in August in Charleston10
UV (maximum) index 8 (Very High) in September in Charleston8
UV (maximum) index 6 (High) in October in Charleston6
UV (maximum) index 4 (Moderate) in November in Charleston4
UV (maximum) index 3 (Moderate) in December in Charleston3

Rainfall in Charleston

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in Charleston10
9 days with some rainfall in February in Charleston9
9 days with some rainfall in March in Charleston9
7 days with some rainfall in April in Charleston7
9 days with some rainfall in May in Charleston9
11 days with some rainfall in June in Charleston11
12 days with some rainfall in July in Charleston12
13 days with some rainfall in August in Charleston13
9 days with some rainfall in September in Charleston9
6 days with some rainfall in October in Charleston6
7 days with some rainfall in November in Charleston7
8 days with some rainfall in December in Charleston8
Average monthly rainfall (mm)
86 mm monthly rainfall in January in Charleston86
81 mm monthly rainfall in February in Charleston81
109 mm monthly rainfall in March in Charleston109
64 mm monthly rainfall in April in Charleston64
95 mm monthly rainfall in May in Charleston95
153 mm monthly rainfall in June in Charleston153
161 mm monthly rainfall in July in Charleston161
185 mm monthly rainfall in August in Charleston185
121 mm monthly rainfall in September in Charleston121
73 mm monthly rainfall in October in Charleston73
60 mm monthly rainfall in November in Charleston60
76 mm monthly rainfall in December in Charleston76

More about Charleston

Charleston by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for South Carolina (Charleston) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Charleston?

Charleston has a temperate climate with hot summers and some rainfall in all months.

Metric (°C / mm)  |  Imperial (°F / inches)

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Tropical storm risk: Charleston, South Carolina hurricane season

% of month affected by tropical storms
0
0
0
0
0
2.5%
2%
3.3%
4.2%
1.6%
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare Charleston with the USA

Below the Charleston chart shows average maximum daytime temperature for Charleston, South Carolina, USA and the USA (Washington).

Maximum daytime temperature (°C)

Charleston, South Carolina, USA
USA (Washington)
14
5
15
7
19
13
23
19
27
24
30
29
31
31
31
30
28
26
24
20
20
14
16
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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