Charleston weather by month

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

Temperature
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in Charleston (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	14	15	19	23	27	30	31	31	28	24	20	16
Min temperature (night-time)	5	6	10	14	19	22	24	24	21	15	11	7
Heat & Humidity	0	0	0	0	M	H	VH	VH	M	0	0	0
Sea temperature	18	18	17	18	22	26	28	28	27	23	20	19

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	6	7	8	9	9	9	9	8	7	7	6	6
Daily hours of daylight	10	11	12	13	14	14	14	13	12	11	10	10
UV Index (Maximum)	3	5	7	9	9	10	10	10	8	6	4	3

Rainfall in Charleston

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	10	9	9	7	9	11	12	13	9	6	7	8
Average monthly rainfall (mm)	86	81	109	64	95	153	161	185	121	73	60	76

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.

Charleston weather in January

Expect daytime maximum temperatures of 14°C in Charleston, South Carolina in January based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 86 mm of rainfall in the month.

14
14°C max day temperature
6
6 hours of sunshine per day
10
10 days with some rainfall
5
5°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
86
86 mm of monthly rainfall
3
3 (Moderate) UV index
18
18°C sea temperature

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Charleston weather in February

Expect daytime maximum temperatures of 15°C in Charleston, South Carolina in February based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 81 mm of rainfall in the month.

15
15°C max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
6
6°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
81
81 mm of monthly rainfall
5
5 (Moderate) UV index
18
18°C sea temperature

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Charleston weather in March

Expect daytime maximum temperatures of 19°C in Charleston, South Carolina in March based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 109 mm of rainfall in the month.

19
19°C max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
109
109 mm of monthly rainfall
7
7 (High) UV index
17
17°C sea temperature

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Charleston weather in April

Expect daytime maximum temperatures of 23°C in Charleston, South Carolina in April based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 64 mm of rainfall in the month.

23
23°C max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
14
14°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
64
64 mm of monthly rainfall
9
9 (Very High) UV index
18
18°C sea temperature

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Charleston weather in May

Expect daytime maximum temperatures of 27°C in Charleston, South Carolina in May based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 95 mm of rainfall in the month.

27
27°C max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
19
19°C min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
95
95 mm of monthly rainfall
9
9 (Very High) UV index
22
22°C sea temperature

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Charleston weather in June

Expect daytime maximum temperatures of 30°C in Charleston, South Carolina in June and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 153 mm of rainfall in the month.

30
30°C max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
22
22°C min night temperature
14
14 hours of daylight per day
H
High heat & humidity
153
153 mm of monthly rainfall
10
10 (Very High) UV index
26
26°C sea temperature

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Charleston weather in July

Expect daytime maximum temperatures of 31°C in Charleston, South Carolina in July and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 12 days with some rainfall and typically 161 mm of rainfall in the month.

31
31°C max day temperature
9
9 hours of sunshine per day
12
12 days with some rainfall
24
24°C min night temperature
14
14 hours of daylight per day
VH
Very High heat & humidity
161
161 mm of monthly rainfall
10
10 (Very High) UV index
28
28°C sea temperature

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Charleston weather in August

Expect daytime maximum temperatures of 31°C in Charleston, South Carolina in August and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 185 mm of rainfall in the month.

31
31°C max day temperature
8
8 hours of sunshine per day
13
13 days with some rainfall
24
24°C min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
185
185 mm of monthly rainfall
10
10 (Very High) UV index
28
28°C sea temperature

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Charleston weather in September

Expect daytime maximum temperatures of 28°C in Charleston, South Carolina in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 121 mm of rainfall in the month.

28
28°C max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
21
21°C min night temperature
12
12 hours of daylight per day
M
Moderate heat & humidity
121
121 mm of monthly rainfall
8
8 (Very High) UV index
27
27°C sea temperature

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Charleston weather in October

Expect daytime maximum temperatures of 24°C in Charleston, South Carolina in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 73 mm of rainfall in the month.

24
24°C max day temperature
7
7 hours of sunshine per day
6
6 days with some rainfall
15
15°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
6
6 (High) UV index
23
23°C sea temperature

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Charleston weather in November

Expect daytime maximum temperatures of 20°C in Charleston, South Carolina in November based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 60 mm of rainfall in the month.

20
20°C max day temperature
6
6 hours of sunshine per day
7
7 days with some rainfall
11
11°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
60
60 mm of monthly rainfall
4
4 (Moderate) UV index
20
20°C sea temperature

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Charleston weather in December

Expect daytime maximum temperatures of 16°C in Charleston, South Carolina in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 76 mm of rainfall in the month.

16
16°C max day temperature
6
6 hours of sunshine per day
8
8 days with some rainfall
7
7°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
76
76 mm of monthly rainfall
3
3 (Moderate) UV index
19
19°C sea temperature

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