West Lafayette Average Rainfall by Month

This page shows the average precipitation in each month of the year in West Lafayette, Indiana. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in West Lafayette?
In West Lafayette, June has the greatest precipitation of any month. On average, West Lafayette gets 4.7 inches of precipitation in June.
June is also the month where rain is most common. 41.7% of days in June will have at least some rain.
What's the Driest Month in West Lafayette?
In West Lafayette, February has the least precipitation of any month. On average, West Lafayette gets 1.85 inches of precipitation in February.
February is also the month where rain is least common. 28.5% of days in February will have measurable rain.
Month Precipitation % Chance
January 2.16 in 29.8
February 1.85 in 28.5
March 2.69 in 34.1
April 3.88 in 38.7
May 4.04 in 40.6
June 4.67 in 41.7
July 4.23 in 38.0
August 3.05 in 33.4
September 2.68 in 31.4
October 2.83 in 30.6
November 2.90 in 33.6
December 2.34 in 33.3
Year 37.32 in 34.4
Weather Station Details
Years Station Coordinates
1965–2024 Purdue University Airport location
1901–1964 West Lafayette 6 NW location
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