What is the hottest month in Isleton, CA?

July is the warmest month, with a normal high of 91°F at Antioch Pumping Plt #3.

What is the coldest month in Isleton, CA?

January is the coldest month, with a normal low of 40°F.

What is the wettest month in Isleton, CA?

January has the most precipitation on average, about 2.68 inches.

Checked Oct 25, 2026

Isleton, CA Climate

1991 to 2020 normals at Antioch Pumping Plt #3, 15 mi from the center of Isleton, elevation 60 ft.

Average weather by month

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

Month	High	Low	Precip.
January	56°	40°	2.68 in
February	61°	44°	2.36 in
March	67°	47°	1.95 in
April	72°	50°	0.91 in
May	79°	54°	0.38 in
June	86°	59°	0.11 in
July	91°	61°	0.00 in
August	90°	60°	0.02 in
September	87°	59°	0.06 in
October	78°	54°	0.42 in
November	65°	46°	1.18 in
December	56°	40°	2.53 in
Year	74°		12.60 in

Frequently asked questions

What is the hottest month in Isleton, CA?: July is the warmest month, with a normal high of 91°F at Antioch Pumping Plt #3.
What is the coldest month in Isleton, CA?: January is the coldest month, with a normal low of 40°F.
What is the wettest month in Isleton, CA?: January has the most precipitation on average, about 2.68 inches.

Today

Isleton, CA 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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