What is the hottest month in Lamar, TX?

August is the warmest month, with a normal high of 92°F at Rockport Aransas CO AP.

What is the coldest month in Lamar, TX?

January is the coldest month, with a normal low of 49°F.

What is the wettest month in Lamar, TX?

September has the most precipitation on average, about 4.18 inches.

Checked Oct 25, 2026

Lamar, TX Climate

1991 to 2020 normals at Rockport Aransas CO AP, 5.3 mi from the center of Lamar, elevation 22 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	65°	49°	1.72 in	--
February	69°	54°	1.05 in	--
March	74°	60°	1.95 in	--
April	80°	66°	1.46 in	--
May	85°	73°	3.20 in	--
June	90°	78°	3.90 in	--
July	91°	79°	2.51 in	--
August	92°	79°	1.50 in	--
September	89°	75°	4.18 in	--
October	84°	68°	2.82 in	--
November	75°	58°	2.43 in	--
December	68°	51°	1.66 in	--
Year	80°		28.38 in	--

Frequently asked questions

What is the hottest month in Lamar, TX?: August is the warmest month, with a normal high of 92°F at Rockport Aransas CO AP.
What is the coldest month in Lamar, TX?: January is the coldest month, with a normal low of 49°F.
What is the wettest month in Lamar, TX?: September has the most precipitation on average, about 4.18 inches.

Today

Lamar, TX forecast

Data sources

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

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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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