What is the hottest month in Mount Pleasant, SC?

July is the warmest month, with a normal high of 91°F at Sullivans Is.

What is the coldest month in Mount Pleasant, SC?

January is the coldest month, with a normal low of 37°F.

What is the wettest month in Mount Pleasant, SC?

August has the most precipitation on average, about 6.72 inches.

Checked Oct 25, 2026

Mount Pleasant, SC Climate

1991 to 2020 normals at Sullivans Is, 7.8 mi from the center of Mount Pleasant, elevation 5 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	59°	37°	3.81 in	--
February	61°	39°	3.30 in	--
March	67°	45°	3.49 in	--
April	75°	54°	3.59 in	--
May	82°	63°	3.33 in	--
June	88°	70°	5.36 in	--
July	91°	73°	5.97 in	--
August	90°	72°	6.72 in	--
September	86°	68°	5.47 in	--
October	78°	58°	3.94 in	--
November	69°	47°	3.00 in	--
December	62°	40°	3.62 in	--
Year	76°		51.60 in	--

Frequently asked questions

What is the hottest month in Mount Pleasant, SC?: July is the warmest month, with a normal high of 91°F at Sullivans Is.
What is the coldest month in Mount Pleasant, SC?: January is the coldest month, with a normal low of 37°F.
What is the wettest month in Mount Pleasant, SC?: August has the most precipitation on average, about 6.72 inches.

Today

Mount Pleasant, 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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