Kona Average Rainfall by Month

This page shows the average precipitation in each month of the year in Kona, Hawaii. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Kona?
In Kona, January has the greatest precipitation of any month. On average, Kona gets 1.3 inches of precipitation in January.
However, May is the month with the greatest chance of precipitation. 15.6% of days in May will have at least some rain.
What's the Driest Month in Kona?
In Kona, July has the least precipitation of any month. On average, Kona gets 0.57 inches of precipitation in July.
October is the month with the lowest chance of precipitation. Only 9.9% of days in October will have measurable rain.
Month Precipitation % Chance
January 1.35 in 10.4
February 1.14 in 10.9
March 1.01 in 15.2
April 0.69 in 11.6
May 0.64 in 15.6
June 0.73 in 14.9
July 0.57 in 13.5
August 0.65 in 13.5
September 0.72 in 15.1
October 0.87 in 9.9
November 0.80 in 10.0
December 1.04 in 11.0
Year 10.33 in 12.8
Weather Station Details
Years Station Coordinates
1998–2024 Kona International Airport location
1981–1997 Kona Airport location
1949–1980 Kona Airport location
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