Astoria Average Rainfall by Month

This page shows the average precipitation in each month of the year in Astoria, Oregon. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Astoria?
In Astoria, November has the greatest precipitation of any month. On average, Astoria gets 11.0 inches of precipitation in November.
November is also the month where rain is most common. 70.3% of days in November will have at least some rain.
What's the Driest Month in Astoria?
In Astoria, July has the least precipitation of any month. On average, Astoria gets 0.82 inches of precipitation in July.
August is the month with the lowest chance of precipitation. 24.8% of days in August will have measurable rain.
Month Precipitation % Chance
January 10.59 in 69.8
February 7.18 in 65.9
March 7.90 in 69.2
April 5.80 in 63.9
May 3.40 in 50.1
June 2.30 in 45.7
July 0.82 in 26.0
August 1.12 in 24.8
September 2.67 in 33.7
October 6.74 in 53.7
November 11.05 in 70.3
December 10.67 in 71.0
Year 70.24 in 53.6
Weather Station Details
Years Station Coordinates
1954–2024 Astoria Regional Airport location
1887–1953 Astoria location
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