Antioch Average Rainfall by Month

This page shows the average precipitation in each month of the year in Antioch, California. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Antioch?
In Antioch, January has the greatest precipitation of any month. On average, Antioch gets 3.0 inches of precipitation in January.
January is also the month where rain is most common. 35.2% of days in January will have at least some rain.
What's the Driest Month in Antioch?
In Antioch, July has the least precipitation of any month. On average, Antioch gets 0.000 inches of precipitation in July.
July is also the month where rain is least common. Only 0.00% of days in July will have measurable rain.
Month Precipitation % Chance
January 3.02 in 35.2
February 2.58 in 32.5
March 1.95 in 25.2
April 0.76 in 12.1
May 0.43 in 8.4
June 0.09 in 2.3
July 0.00 in 0.0
August 0.02 in 0.7
September 0.06 in 1.2
October 0.40 in 4.3
November 1.30 in 16.2
December 2.73 in 28.1
Year 12.69 in 14.6
Weather Station Details
Years Station Coordinates
1956–2021 Antioch Pumping Plant #3 location
1915–1955 Antioch Fireboard Mills location
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