Honolulu Average Rainfall by Month

This page shows the average precipitation in each month of the year in Honolulu, Hawaii. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Honolulu?
In Honolulu, March has the greatest precipitation of any month. On average, Honolulu gets 2.4 inches of precipitation in March.
However, November is the month with the greatest chance of precipitation. 28.7% of days in November will have at least some rain.
What's the Driest Month in Honolulu?
In Honolulu, June has the least precipitation of any month. On average, Honolulu gets 0.49 inches of precipitation in June.
August is the month with the lowest chance of precipitation. 18.5% of days in August will have measurable rain.
Month Precipitation % Chance
January 1.82 in 24.1
February 1.94 in 26.7
March 2.35 in 28.2
April 0.76 in 24.9
May 0.82 in 19.4
June 0.49 in 20.9
July 0.51 in 23.0
August 0.84 in 18.5
September 0.83 in 23.4
October 1.50 in 24.9
November 2.24 in 28.7
December 2.16 in 28.7
Year 16.26 in 24.3
Weather Station Details
Years Station Coordinates
1943–2024 Honolulu International Airport location
1905–1929 Insane Asylum location
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