Charleston
South Carolina, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, in the twilight light
Trees along both sides of a street in Charleston, South Carolina, in the twilight light
January, like December, is a moderate winter month in Charleston, South Carolina, with temperature in the range of an average high of 59°F (15°C) and an average low of 37.6°F (3.1°C). The coldest month is January, with an average high-temperature of 59°F (15°C) and an average low-temperature of 37.6°F (3.1°C). Weather in January »
February, the last month of the winter, in Charleston, is an enjoyable month, with temperature in the range of an average high of 62.8°F (17.1°C) and an average low of 40.6°F (4.8°C). In February, the average high-temperature is practically the same as in January - a comfortable 62.8°F (17.1°C). Weather in February »

The first month of the spring, March, is an agreeable month in Charleston, South Carolina, with average temperature ranging between max 69.6°F (20.9°C) and min 46.8°F (8.2°C). In March, the average high-temperature slightly increases, from a comfortable 62.8°F (17.1°C) in February, to an agreeable 69.6°F (20.9°C). Weather in March »

April in Charleston, South Carolina, is a warm spring month, with average temperature varying between 53.2°F (11.8°C) and 76.5°F (24.7°C). In Charleston, the average high-temperature in April marginally rises, from an agreeable 69.6°F (20.9°C) in March, to a warm 76.5°F (24.7°C). Weather in April »

The last month of the spring, May, is also a moderately hot month in Charleston, South Carolina, with average temperature fluctuating between 83.1°F (28.4°C) and 61.9°F (16.6°C). In Charleston, the average high-temperature marginally rises, from 76.5°F (24.7°C) in April, to a still moderately hot 83.1°F (28.4°C). Weather in May »

The first month of the summer, June, is a tropical month in Charleston, South Carolina, with average temperature ranging between min 69.6°F (20.9°C) and max 88.3°F (31.3°C). In Charleston, the average high-temperature is relatively the same as in May - a hot 88.3°F (31.3°C). Weather in June »

July, like June, is another tropical summer month in Charleston, South Carolina, with average temperature ranging between min 73°F (22.8°C) and max 91°F (32.8°C). With an average high-temperature of 91°F (32.8°C) and an average low-temperature of 73°F (22.8°C), July is the warmest month. Weather in July »

The last month of the summer, August, is another hot month in Charleston, South Carolina, with average temperature ranging between max 89.4°F (31.9°C) and min 72.3°F (22.4°C). In August, the average high-temperature is essentially the same as in July - a still tropical 89.4°F (31.9°C). Weather in August »

The first month of the autumn, September, is still a warm month in Charleston, South Carolina, with average temperature fluctuating between 84.7°F (29.3°C) and 67.3°F (19.6°C). In September, the average high-temperature is practically the same as in August - a warm 84.7°F (29.3°C). Weather in September »

October, the same as September, is another warm autumn month in Charleston, South Carolina, with average temperature ranging between max 77.2°F (25.1°C) and min 56.8°F (13.8°C). In October, the average high-temperature marginally drops, from 84.7°F (29.3°C) in September, to a still warm 77.2°F (25.1°C). Weather in October »

November, the last month of the autumn, in Charleston, is also an agreeable month, with average temperature fluctuating between 69.8°F (21°C) and 47.5°F (8.6°C). In November, the average high-temperature marginally drops, from a moderately hot 77.2°F (25.1°C) in October, to an agreeable 69.8°F (21°C). Weather in November »

December, the first month of the winter, in Charleston, is also an enjoyable month, with average temperature varying between 61.5°F (16.4°C) and 40.1°F (4.5°C). In Charleston, South Carolina, the average high-temperature in December slightly decreases, from a pleasant 69.8°F (21°C) in November, to a comfortable 61.5°F (16.4°C). Weather in December »

What is the coldest month in Charleston?

The coldest month is January, with an average high-temperature of 59°F (15°C) and an average low-temperature of 37.6°F (3.1°C).

How many days does it rain in Charleston?

Throughout the year, there are 112.7 rainfall days, and 51" (1296.1mm) of precipitation is accumulated.

How many days does it snow in Charleston?

Throughout the year, in Charleston, South Carolina, there are 0.5 snowfall days, and 0.7" (17.8mm) of snow is accumulated.

When is the lowest UV index in Charleston?

January and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the least humid month in Charleston?

February is the least humid month in Charleston, South Carolina, with an average relative humidity of 67.4%.

When does it snow in Charleston?

Months with snowfall in Charleston, South Carolina, are February and December.

What month is the ocean coldest in Charleston?

February is the month with the coldest seawater in Charleston, with an average ocean temperature of 62.1°F (16.7°C). For most, swimming in 62.1°F (16.7°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What month has the most sunshine in Charleston?

May has the most sunshine of the year, with an average of 9.5h of sunshine.

When are the longest days in Charleston?

The month with the longest days in Charleston, South Carolina, is June, with an average of 14.3h of daylight.

What are the months with the highest UV index in Charleston?

Months with the highest UV index are June through August, with an average maximum UV index of 10.

What is the warmest month in Charleston?

July is the warmest month in Charleston, South Carolina, with an average high-temperature of 91°F (32.8°C) and an average low-temperature of 73°F (22.8°C).

What is the most humid month in Charleston?

The most humid month in Charleston is August, with an average relative humidity of 78.9%.

What is the wettest month in Charleston?

The month with the most rainfall is August when the rain falls for 13.2 days and typically aggregates up to 7.1" (181.6mm) of precipitation.

What is the month with the warmest ocean in Charleston?

The month with the warmest seawater is August, with an average ocean temperature of 83.5°F (28.6°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the driest month in Charleston?

November is the month with the least rainfall in Charleston. Rain falls for 7 days and accumulates 2.4" (61.7mm) of precipitation.

What is the snowiest month in Charleston?

December is the month with the most snowfall in Charleston, South Carolina. Snow falls for 0.2 days and accumulates 0.5" (12.7mm) of snow.

What is the month with the shortest days in Charleston?

With an average of 10h of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Charleston?

The month with the least sunshine in Charleston, South Carolina, is December, with an average of 5.5h of sunshine.
Average temperature - Charleston, SC
Average humidity - Charleston, SC

The month with the highest relative humidity is August (78.9%).
The month with the lowest relative humidity is February (67.4%).

Average rainfall - Charleston, SC
Average rainfall days - Charleston, SC

The month with the highest number of rainy days is August (13.2 days).
The month with the lowest number of rainy days is November (7 days).

Average snowfall - Charleston, SC

The month with the highest snowfall is December (0.5").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

Average snowfall days - Charleston, SC

Months with the highest number of snowfall days are February and December (0.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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).

Average daylight / Average sunshine - Charleston, SC