Ketchikan Average Rainfall by Month

This page shows the average precipitation in each month of the year in Ketchikan, Alaska. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Ketchikan?
In Ketchikan, October has the greatest precipitation of any month. On average, Ketchikan gets 18.2 inches of precipitation in October.
However, November is the month with the greatest chance of precipitation. 78.7% of days in November will have at least some rain.
What's the Driest Month in Ketchikan?
In Ketchikan, June has the least precipitation of any month. On average, Ketchikan gets 6.91 inches of precipitation in June.
July is the month with the lowest chance of precipitation. 51.6% of days in July will have measurable rain.
Month Precipitation % Chance
January 16.42 in 70.9
February 11.44 in 59.6
March 11.38 in 66.4
April 10.21 in 64.8
May 8.83 in 51.9
June 6.91 in 54.6
July 7.23 in 51.6
August 11.40 in 54.2
September 14.43 in 64.8
October 18.19 in 73.7
November 17.20 in 78.7
December 15.82 in 72.2
Year 149.34 in 63.7
Weather Station Details
Years Station Coordinates
1910–2024 Ketchikan International Airport location
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