Nantucket Average Rainfall by Month

This page shows the average precipitation in each month of the year in Nantucket, Massachusetts. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Nantucket?
In Nantucket, October has the greatest precipitation of any month. On average, Nantucket gets 4.5 inches of precipitation in October.
However, August is the month with the greatest chance of precipitation. 43.3% of days in August will have at least some rain.
What's the Driest Month in Nantucket?
In Nantucket, July has the least precipitation of any month. On average, Nantucket gets 2.35 inches of precipitation in July.
March is the month with the lowest chance of precipitation. 34.0% of days in March will have measurable rain.
Month Precipitation % Chance
January 3.07 in 37.5
February 2.77 in 36.1
March 3.82 in 34.0
April 3.53 in 39.6
May 3.16 in 37.9
June 2.94 in 38.7
July 2.35 in 38.3
August 2.86 in 43.3
September 3.62 in 41.7
October 4.45 in 42.1
November 3.73 in 36.2
December 3.83 in 39.9
Year 39.69 in 38.5
Weather Station Details
Years Station Coordinates
1948–2024 Nantucket Memorial Airport location
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