Altoona Average Rainfall by Month

This page shows the average precipitation in each month of the year in Altoona, Pennsylvania. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Altoona?
In Altoona, September has the greatest precipitation of any month. On average, Altoona gets 4.0 inches of precipitation in September.
However, May is the month with the greatest chance of precipitation. 43.8% of days in May will have at least some rain.
What's the Driest Month in Altoona?
In Altoona, February has the least precipitation of any month. On average, Altoona gets 1.96 inches of precipitation in February.
November is the month with the lowest chance of precipitation. 33.1% of days in November will have measurable rain.
Month Precipitation % Chance
January 2.23 in 36.3
February 1.96 in 34.0
March 3.03 in 38.7
April 3.28 in 42.3
May 3.71 in 43.8
June 3.42 in 41.1
July 3.48 in 39.0
August 3.25 in 34.7
September 3.96 in 34.2
October 2.92 in 34.7
November 2.85 in 33.1
December 2.57 in 33.1
Year 36.64 in 37.1
Weather Station Details
Years Station Coordinates
1949–2024 Altoona-Blair County Airport location
1893–1948 Altoona Horseshoe Curve location
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