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 (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
57°F maximum daytime temperature in January in Charleston57
59°F maximum daytime temperature in February in Charleston59
66°F maximum daytime temperature in March in Charleston66
73°F maximum daytime temperature in April in Charleston73
81°F maximum daytime temperature in May in Charleston81
86°F maximum daytime temperature in June in Charleston86
88°F maximum daytime temperature in July in Charleston88
88°F maximum daytime temperature in August in Charleston88
82°F maximum daytime temperature in September in Charleston82
75°F maximum daytime temperature in October in Charleston75
68°F maximum daytime temperature in November in Charleston68
61°F maximum daytime temperature in December in Charleston61
Min temperature (night-time)
41°F minimum night-time temperature in January in Charleston41
43°F minimum night-time temperature in February in Charleston43
50°F minimum night-time temperature in March in Charleston50
57°F minimum night-time temperature in April in Charleston57
66°F minimum night-time temperature in May in Charleston66
72°F minimum night-time temperature in June in Charleston72
75°F minimum night-time temperature in July in Charleston75
75°F minimum night-time temperature in August in Charleston75
70°F minimum night-time temperature in September in Charleston70
59°F minimum night-time temperature in October in Charleston59
52°F minimum night-time temperature in November in Charleston52
45°F minimum night-time temperature in December in Charleston45
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
64°F sea temperature in January in Charleston64
64°F sea temperature in February in Charleston64
63°F sea temperature in March in Charleston63
64°F sea temperature in April in Charleston64
72°F sea temperature in May in Charleston72
79°F sea temperature in June in Charleston79
82°F sea temperature in July in Charleston82
82°F sea temperature in August in Charleston82
81°F sea temperature in September in Charleston81
73°F sea temperature in October in Charleston73
68°F sea temperature in November in Charleston68
66°F sea temperature in December in Charleston66

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 (inches)
3.4 inches monthly rainfall in January in Charleston3.4
3.2 inches monthly rainfall in February in Charleston3.2
4.3 inches monthly rainfall in March in Charleston4.3
2.5 inches monthly rainfall in April in Charleston2.5
3.7 inches monthly rainfall in May in Charleston3.7
6.0 inches monthly rainfall in June in Charleston6.0
6.3 inches monthly rainfall in July in Charleston6.3
7.3 inches monthly rainfall in August in Charleston7.3
4.8 inches monthly rainfall in September in Charleston4.8
2.9 inches monthly rainfall in October in Charleston2.9
2.4 inches monthly rainfall in November in Charleston2.4
3.0 inches monthly rainfall in December in Charleston3.0

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 57°F 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 3.4 inches of rainfall in the month.

  • 57°F maximum daytime temperature in January in Charleston57
    57°F max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in January in Charleston10
    10 days with some rainfall
  • 41°F minimum night-time temperature in January in Charleston41
    41°F min night temperature
  • 10 hours of daylight per day in January in Charleston10
    10 hours of daylight per day
  • No heat & humidity in January in Charleston0
    No heat & humidity
  • 3.4 inches monthly rainfall in January in Charleston3.4
    3.4 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in Charleston3
    3 (Moderate) UV index
  • 64°F sea temperature in January in Charleston64
    64°F sea temperature

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Charleston weather in February

Expect daytime maximum temperatures of 59°F in Charleston, South Carolina in February based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 3.2 inches of rainfall in the month.

  • 59°F maximum daytime temperature in February in Charleston59
    59°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in February in Charleston9
    9 days with some rainfall
  • 43°F minimum night-time temperature in February in Charleston43
    43°F min night temperature
  • 11 hours of daylight per day in February in Charleston11
    11 hours of daylight per day
  • No heat & humidity in February in Charleston0
    No heat & humidity
  • 3.2 inches monthly rainfall in February in Charleston3.2
    3.2 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in February in Charleston5
    5 (Moderate) UV index
  • 64°F sea temperature in February in Charleston64
    64°F sea temperature

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Charleston weather in March

Expect daytime maximum temperatures of 66°F in Charleston, South Carolina in March based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 4.3 inches of rainfall in the month.

  • 66°F maximum daytime temperature in March in Charleston66
    66°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in March in Charleston9
    9 days with some rainfall
  • 50°F minimum night-time temperature in March in Charleston50
    50°F min night temperature
  • 12 hours of daylight per day in March in Charleston12
    12 hours of daylight per day
  • No heat & humidity in March in Charleston0
    No heat & humidity
  • 4.3 inches monthly rainfall in March in Charleston4.3
    4.3 inches of monthly rainfall
  • UV (maximum) index 7 (High) in March in Charleston7
    7 (High) UV index
  • 63°F sea temperature in March in Charleston63
    63°F sea temperature

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Charleston weather in April

Expect daytime maximum temperatures of 73°F in Charleston, South Carolina in April based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 2.5 inches of rainfall in the month.

  • 73°F maximum daytime temperature in April in Charleston73
    73°F max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in April in Charleston7
    7 days with some rainfall
  • 57°F minimum night-time temperature in April in Charleston57
    57°F min night temperature
  • 13 hours of daylight per day in April in Charleston13
    13 hours of daylight per day
  • No heat & humidity in April in Charleston0
    No heat & humidity
  • 2.5 inches monthly rainfall in April in Charleston2.5
    2.5 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in April in Charleston9
    9 (Very High) UV index
  • 64°F sea temperature in April in Charleston64
    64°F sea temperature

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Charleston weather in May

Expect daytime maximum temperatures of 81°F in Charleston, South Carolina in May based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 3.7 inches of rainfall in the month.

  • 81°F maximum daytime temperature in May in Charleston81
    81°F max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in May in Charleston9
    9 days with some rainfall
  • 66°F minimum night-time temperature in May in Charleston66
    66°F min night temperature
  • 14 hours of daylight per day in May in Charleston14
    14 hours of daylight per day
  • Moderate heat & humidity in May in CharlestonM
    Moderate heat & humidity
  • 3.7 inches monthly rainfall in May in Charleston3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in Charleston9
    9 (Very High) UV index
  • 72°F sea temperature in May in Charleston72
    72°F sea temperature

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Charleston weather in June

Expect daytime maximum temperatures of 86°F 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 6.0 inches of rainfall in the month.

  • 86°F maximum daytime temperature in June in Charleston86
    86°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in June in Charleston11
    11 days with some rainfall
  • 72°F minimum night-time temperature in June in Charleston72
    72°F min night temperature
  • 14 hours of daylight per day in June in Charleston14
    14 hours of daylight per day
  • High heat & humidity in June in CharlestonH
    High heat & humidity
  • 6.0 inches monthly rainfall in June in Charleston6.0
    6.0 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in June in Charleston10
    10 (Very High) UV index
  • 79°F sea temperature in June in Charleston79
    79°F sea temperature

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Charleston weather in July

Expect daytime maximum temperatures of 88°F 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 6.3 inches of rainfall in the month.

  • 88°F maximum daytime temperature in July in Charleston88
    88°F max day temperature
  • 9 hours of sunshine per day
  • 12 days with some rainfall in July in Charleston12
    12 days with some rainfall
  • 75°F minimum night-time temperature in July in Charleston75
    75°F min night temperature
  • 14 hours of daylight per day in July in Charleston14
    14 hours of daylight per day
  • Very high heat & humidity in July in CharlestonVH
    Very High heat & humidity
  • 6.3 inches monthly rainfall in July in Charleston6.3
    6.3 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in July in Charleston10
    10 (Very High) UV index
  • 82°F sea temperature in July in Charleston82
    82°F sea temperature

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Charleston weather in August

Expect daytime maximum temperatures of 88°F 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 7.3 inches of rainfall in the month.

  • 88°F maximum daytime temperature in August in Charleston88
    88°F max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in August in Charleston13
    13 days with some rainfall
  • 75°F minimum night-time temperature in August in Charleston75
    75°F min night temperature
  • 13 hours of daylight per day in August in Charleston13
    13 hours of daylight per day
  • Very high heat & humidity in August in CharlestonVH
    Very High heat & humidity
  • 7.3 inches monthly rainfall in August in Charleston7.3
    7.3 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Charleston10
    10 (Very High) UV index
  • 82°F sea temperature in August in Charleston82
    82°F sea temperature

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Charleston weather in September

Expect daytime maximum temperatures of 82°F in Charleston, South Carolina in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 4.8 inches of rainfall in the month.

  • 82°F maximum daytime temperature in September in Charleston82
    82°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Charleston9
    9 days with some rainfall
  • 70°F minimum night-time temperature in September in Charleston70
    70°F min night temperature
  • 12 hours of daylight per day in September in Charleston12
    12 hours of daylight per day
  • Moderate heat & humidity in September in CharlestonM
    Moderate heat & humidity
  • 4.8 inches monthly rainfall in September in Charleston4.8
    4.8 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Charleston8
    8 (Very High) UV index
  • 81°F sea temperature in September in Charleston81
    81°F sea temperature

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Charleston weather in October

Expect daytime maximum temperatures of 75°F in Charleston, South Carolina in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 2.9 inches of rainfall in the month.

  • 75°F maximum daytime temperature in October in Charleston75
    75°F max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in October in Charleston6
    6 days with some rainfall
  • 59°F minimum night-time temperature in October in Charleston59
    59°F min night temperature
  • 11 hours of daylight per day in October in Charleston11
    11 hours of daylight per day
  • No heat & humidity in October in Charleston0
    No heat & humidity
  • 2.9 inches monthly rainfall in October in Charleston2.9
    2.9 inches of monthly rainfall
  • UV (maximum) index 6 (High) in October in Charleston6
    6 (High) UV index
  • 73°F sea temperature in October in Charleston73
    73°F sea temperature

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Charleston weather in November

Expect daytime maximum temperatures of 68°F in Charleston, South Carolina in November based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 2.4 inches of rainfall in the month.

  • 68°F maximum daytime temperature in November in Charleston68
    68°F max day temperature
  • 6 hours of sunshine per day
  • 7 days with some rainfall in November in Charleston7
    7 days with some rainfall
  • 52°F minimum night-time temperature in November in Charleston52
    52°F min night temperature
  • 10 hours of daylight per day in November in Charleston10
    10 hours of daylight per day
  • No heat & humidity in November in Charleston0
    No heat & humidity
  • 2.4 inches monthly rainfall in November in Charleston2.4
    2.4 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in November in Charleston4
    4 (Moderate) UV index
  • 68°F sea temperature in November in Charleston68
    68°F sea temperature

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Charleston weather in December

Expect daytime maximum temperatures of 61°F in Charleston, South Carolina in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 3.0 inches of rainfall in the month.

  • 61°F maximum daytime temperature in December in Charleston61
    61°F max day temperature
  • 6 hours of sunshine per day
  • 8 days with some rainfall in December in Charleston8
    8 days with some rainfall
  • 45°F minimum night-time temperature in December in Charleston45
    45°F min night temperature
  • 10 hours of daylight per day in December in Charleston10
    10 hours of daylight per day
  • No heat & humidity in December in Charleston0
    No heat & humidity
  • 3.0 inches monthly rainfall in December in Charleston3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in December in Charleston3
    3 (Moderate) UV index
  • 66°F sea temperature in December in Charleston66
    66°F sea temperature

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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.

Metric (°C)  |  Imperial (°F)

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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 UK

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

Maximum daytime temperature (°F)

Charleston, South Carolina, USA
UK (London)
57
45
59
45
66
50
73
55
81
63
86
68
88
72
88
72
82
66
75
59
68
50
61
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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