Oroville Average Rainfall by Month

This page shows the average precipitation in each month of the year in Oroville, California. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Oroville?
In Oroville, January has the greatest precipitation of any month. On average, Oroville gets 5.4 inches of precipitation in January.
January is also the month where rain is most common. 35.8% of days in January will have at least some rain.
What's the Driest Month in Oroville?
In Oroville, July has the least precipitation of any month. On average, Oroville gets 0.007 inches of precipitation in July.
July is also the month where rain is least common. Only 0.33% of days in July will have measurable rain.
Month Precipitation % Chance
January 5.42 in 35.8
February 4.73 in 33.4
March 4.62 in 32.7
April 2.14 in 21.5
May 1.41 in 14.7
June 0.53 in 5.9
July 0.01 in 0.3
August 0.14 in 1.1
September 0.36 in 3.0
October 1.47 in 10.3
November 3.11 in 22.7
December 5.25 in 33.2
Year 29.57 in 17.8
Weather Station Details
Years Station Coordinates
1953–2024 Oroville location
1893–1953 Oroville 1 N location
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