What is the hottest month in Denison, TX?

August is the warmest month, with a normal high of 93°F at Sherman.

What is the coldest month in Denison, TX?

January is the coldest month, with a normal low of 34°F.

What is the wettest month in Denison, TX?

May has the most precipitation on average, about 5.54 inches.

Checked Oct 25, 2026

Denison, TX Climate

1991 to 2020 normals at Sherman, 6.7 mi from the center of Denison, elevation 760 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	53°	34°	2.52 in	--
February	57°	37°	2.76 in	--
March	65°	45°	3.96 in	--
April	73°	53°	3.87 in	--
May	80°	62°	5.54 in	--
June	88°	70°	4.54 in	--
July	93°	74°	2.90 in	--
August	93°	73°	2.88 in	--
September	85°	66°	3.43 in	--
October	75°	55°	4.77 in	--
November	63°	44°	3.50 in	--
December	54°	36°	3.62 in	--
Year	73°		44.29 in	--

Frequently asked questions

What is the hottest month in Denison, TX?: August is the warmest month, with a normal high of 93°F at Sherman.
What is the coldest month in Denison, TX?: January is the coldest month, with a normal low of 34°F.
What is the wettest month in Denison, TX?: May has the most precipitation on average, about 5.54 inches.

Today

Denison, 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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