Climate and monthly weather forecast
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina
Trees along both sides of a street in Charleston, South Carolina

Weather in January

January, the same as December, in Charleston, South Carolina, is a moderate winter month, with an average temperature fluctuating between 57°F (13.9°C) and 44.4°F (6.9°C). The coldest month is January, with an average high-temperature of 57°F (13.9°C) and an average low-temperature of 44.4°F (6.9°C). Weather in January »

Weather in February

February, the last month of the winter in Charleston, is another mild month, with temperature in the range of an average high of 60.4°F (15.8°C) and an average low of 47.7°F (8.7°C). In Charleston, the average high-temperature in February is practically the same as in January - a still mild 60.4°F (15.8°C). Weather in February »

Weather in March

March, the first month of the spring in Charleston, is an enjoyable month, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 65.1°F (18.4°C). In Charleston, the average high-temperature in March is essentially the same as in February - an enjoyable 65.1°F (18.4°C). Weather in March »

Weather in April

April is an agreeable spring month in Charleston, South Carolina, with an average temperature varying between 72.7°F (22.6°C) and 60.4°F (15.8°C). In April, the average high-temperature marginally rises from an enjoyable 65.1°F (18.4°C) in March to a pleasant 72.7°F (22.6°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Charleston, South Carolina, with an average temperature ranging between min 68.2°F (20.1°C) and max 79.5°F (26.4°C). In May, the average high-temperature marginally rises from an agreeable 72.7°F (22.6°C) in April to a warm 79.5°F (26.4°C). Weather in May »

Weather in June

June, the first month of the summer in Charleston, is still a warm month, with an average temperature fluctuating between 74.7°F (23.7°C) and 85.8°F (29.9°C). In June, the average high-temperature marginally rises from a warm 79.5°F (26.4°C) in May to a still moderately hot 85.8°F (29.9°C). Weather in June »

Weather in July

July in Charleston, South Carolina, is a tropical summer month, with temperature in the range of an average high of 88.2°F (31.2°C) and an average low of 77.4°F (25.2°C). July is the warmest month, with an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 77.4°F (25.2°C). In July, the average heat index is computed to be a very hot 103.6°F (39.8°C). Weather in July »

Weather in August

August, the last month of the summer in Charleston, is another hot month, with temperature in the range of an average low of 76.8°F (24.9°C) and an average high of 87.4°F (30.8°C). In Charleston, the average high-temperature in August is practically the same as in July - a still tropical 87.4°F (30.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Charleston, South Carolina, with an average temperature fluctuating between 83.5°F (28.6°C) and 73°F (22.8°C). In September, the average high-temperature is essentially the same as in August - a moderately hot 83.5°F (28.6°C). Weather in September »

Weather in October

October, like September, in Charleston, South Carolina, is a moderately hot autumn month, with an average temperature ranging between max 75.9°F (24.4°C) and min 64°F (17.8°C). In Charleston, the average high-temperature in October slightly decreases from a warm 83.5°F (28.6°C) in September to a still moderately hot 75.9°F (24.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in Charleston, South Carolina, with temperature in the range of an average low of 53.4°F (11.9°C) and an average high of 65.7°F (18.7°C). In November, the average high-temperature decreases from a warm 75.9°F (24.4°C) in October to a comfortable 65.7°F (18.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Charleston, South Carolina, with an average temperature fluctuating between 60.8°F (16°C) and 49.3°F (9.6°C). In Charleston, the average high-temperature in December is practically the same as in November - a still comfortable 60.8°F (16°C). Weather in December »
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FAQ

What is the coldest month in Charleston?

With an average high-temperature of 57°F (13.9°C) and an average low-temperature of 44.4°F (6.9°C), January is the coldest month.

What are the least humid months in Charleston?

The months with the lowest humidity in Charleston, South Carolina, are January and March, with an average relative humidity of 73%.

What is the driest month in Charleston?

The month with the least rainfall in Charleston, South Carolina, is January, when the rain falls for 9.8 days and typically collects 1.42" (36mm) of precipitation.

How much does it rain in Charleston?

In Charleston, South Carolina, during the entire year, the rain falls for 178.9 days and collects up to 41.93" (1065mm) of precipitation.

When does it snow in Charleston?

Months with snowfall in Charleston are January and December.

When does it snow the most in Charleston?

The month with the most snowfall in Charleston, South Carolina, is January, when snow falls for 0.4 days and typically aggregates up to 0.12" (3mm) of snow.

How much does it snow in Charleston?

In Charleston, during the entire year, snow falls for 0.6 days and aggregates up to 0.16" (4mm) of snow.

What is the month with the lowest UV index in Charleston?

The month with the lowest UV index is January, with an average maximum UV index of 3.

When it does not snow in Charleston?

February through November are months without snowfall in Charleston.

What is the month with the coldest ocean in Charleston?

February is the month with the coldest seawater, with an average ocean temperature of 62.1°F (16.7°C).

When is Daylight Saving Time (DST) in Charleston?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What is the month with the highest UV index in Charleston?

May through August, with an average maximum UV index of 7, are months with the highest UV index in Charleston, South Carolina.

When are the longest days in Charleston?

With an average of 14h and 17min of daylight, June has the longest days of the year in Charleston.

What is the warmest month in Charleston?

July is the warmest month in Charleston, with an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 77.4°F (25.2°C).

What month has the most sunshine in Charleston?

July has the most sunshine of the year, with an average of 11h of sunshine.

What is the rainiest month in Charleston?

August is the month with the most rainfall in Charleston, South Carolina. Rain falls for 24.8 days and accumulates 7.13" (181mm) of precipitation.

When is the ocean warmest in Charleston?

August is the month with the warmest seawater in Charleston, South Carolina, with an average ocean temperature of 83.5°F (28.6°C).

What is the most humid month in Charleston?

The most humid month is December, with an average relative humidity of 78%.

What is the month with the shortest days in Charleston?

The month with the shortest days in Charleston is December, with an average of 10h and 2min of daylight.

What is the month with the least sunshine in Charleston?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Charleston, South Carolina.

Average temperature
Charleston, SC

Average temperature - Charleston, SC

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (57°F).

The month with the highest average low temperature is July (77.4°F).
The coldest month (with the lowest average low temperature) is January (44.4°F).

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Average pressure
Charleston, SC

Average pressure - Charleston, SC

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed
Charleston, SC

Average wind speed - Charleston, SC

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).

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Average humidity
Charleston, SC

Average humidity - Charleston, SC

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).

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Average rainfall
Charleston, SC

Average rainfall - Charleston, SC

The wettest month (with the highest rainfall) is August (7.13").
The driest month (with the least rainfall) is January (1.42").

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Average rainfall days
Charleston, SC

Average rainfall days - Charleston, SC

The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is November (8.7 days).

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Average snowfall
Charleston, SC

Average snowfall - Charleston, SC

The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days
Charleston, SC

Average snowfall days - Charleston, SC

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature
Charleston, SC

Average sea temperature - Charleston, SC

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).

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Average daylight / Average sunshine
Charleston, SC

Average daylight / Average sunshine - Charleston, SC

The month with the longest days is June (Average daylight: 14h and 17min).
The month with the shortest days is December (Average daylight: 10h and 2min).

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days
Charleston, SC

Average sunshine days - Charleston, SC

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (3.8 days).

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Average visibility
Charleston, SC

Average visibility - Charleston, SC

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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