What is the hottest month in Marathon, FL?

August is the warmest month, with a normal high of 90°F at Curry Hammock Sp.

What is the coldest month in Marathon, FL?

January is the coldest month, with a normal low of 62°F.

What is the wettest month in Marathon, FL?

August has the most precipitation on average, about 7.27 inches.

Checked Oct 25, 2026

Marathon, FL Climate

1991 to 2020 normals at Curry Hammock Sp, 1.6 mi from the center of Marathon, elevation 4 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	76°	62°	1.79 in	--
February	78°	64°	1.79 in	--
March	80°	66°	1.64 in	--
April	83°	71°	2.47 in	--
May	86°	74°	3.47 in	--
June	89°	77°	5.00 in	--
July	90°	79°	4.17 in	--
August	90°	79°	7.27 in	--
September	89°	77°	6.87 in	--
October	86°	75°	7.05 in	--
November	82°	69°	2.44 in	--
December	78°	66°	2.03 in	--
Year	84°		45.99 in	--

Frequently asked questions

What is the hottest month in Marathon, FL?: August is the warmest month, with a normal high of 90°F at Curry Hammock Sp.
What is the coldest month in Marathon, FL?: January is the coldest month, with a normal low of 62°F.
What is the wettest month in Marathon, FL?: August has the most precipitation on average, about 7.27 inches.

Today

Marathon, FL 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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