Monthly weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light
Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light

What is the coldest month in Charleston?

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

How much does it rain in Charleston?

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

How many days does it snow in Charleston?

In Charleston, during the entire year, snow falls for 0.5 days, and aggregates up to 0.7" (17.8mm) of snow.

When does it snow in Charleston?

February and December are months with snowfall.

What is the warmest month in Charleston?

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 in Charleston, South Carolina.

What is the wettest month in Charleston?

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

What is the driest month in Charleston?

The month with the least rainfall is November when the rain falls for 7 days and typically collects 2.4" (61.7mm) of precipitation.

What is the snowiest month in Charleston?

The month with the most snowfall in Charleston, South Carolina, is December when snow falls for 0.2 days and typically aggregates up to 0.5" (12.7mm) of snow.
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
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