What is the hottest month in Irwin, SC?

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

What is the coldest month in Irwin, SC?

January is the coldest month, with a normal low of 33°F.

What is the wettest month in Irwin, SC?

June has the most precipitation on average, about 4.11 inches.

Checked Oct 25, 2026

Irwin, SC Climate

1991 to 2020 normals at Winthrop Univ, 21 mi from the center of Irwin, elevation 650 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	54°	33°	3.58 in	--
February	58°	35°	3.12 in	--
March	66°	42°	3.90 in	--
April	75°	50°	3.73 in	--
May	81°	59°	3.53 in	--
June	88°	67°	4.11 in	--
July	91°	70°	3.57 in	--
August	89°	69°	3.72 in	--
September	84°	63°	3.56 in	--
October	74°	51°	2.94 in	--
November	64°	41°	3.28 in	--
December	56°	35°	3.58 in	--
Year	73°		42.62 in	--

Frequently asked questions

What is the hottest month in Irwin, SC?: July is the warmest month, with a normal high of 91°F at Winthrop Univ.
What is the coldest month in Irwin, SC?: January is the coldest month, with a normal low of 33°F.
What is the wettest month in Irwin, SC?: June has the most precipitation on average, about 4.11 inches.

Today

Irwin, 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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