What is the hottest month in Charleston, SC?

July is the warmest month, with a normal high of 88°F at Charleston City.

What is the coldest month in Charleston, SC?

January is the coldest month, with a normal low of 44°F.

What is the wettest month in Charleston, SC?

August has the most precipitation on average, about 6.11 inches.

Checked Oct 25, 2026

Charleston, SC Climate

1991 to 2020 normals at Charleston City, 3.3 mi from the center of Charleston, elevation 10 ft.

Average weather by month

Select a month for daily normals and last year's weather

Month	High	Low	Precip.	Snow
January	58°	44°	2.56 in	--
February	60°	46°	2.56 in	--
March	66°	52°	3.03 in	--
April	72°	60°	2.96 in	--
May	79°	68°	2.58 in	--
June	84°	74°	4.85 in	--
July	88°	77°	5.08 in	--
August	86°	77°	6.11 in	--
September	83°	73°	5.25 in	--
October	76°	63°	4.07 in	--
November	67°	53°	2.30 in	--
December	61°	47°	2.91 in	--
Year	73°		44.26 in	--

Frequently asked questions

What is the hottest month in Charleston, SC?: July is the warmest month, with a normal high of 88°F at Charleston City.
What is the coldest month in Charleston, SC?: January is the coldest month, with a normal low of 44°F.
What is the wettest month in Charleston, SC?: August has the most precipitation on average, about 6.11 inches.

Today

Charleston, SC forecast

Data sources

U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information
U.S. Climate Normals 1991-2020 (daily) and GHCN-Daily via Access Data ServiceNOAA National Centers for Environmental Information

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About this data

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Climate normals are 30-year averages measured at one weather station, which may be miles from the place named here or at a different elevation.

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