Ephrata Average Rainfall by Month

This page shows the average precipitation in each month of the year in Ephrata, Washington. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Ephrata?
In Ephrata, January has the greatest precipitation of any month. On average, Ephrata gets 0.9 inches of precipitation in January.
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 Ephrata?
In Ephrata, August has the least precipitation of any month. On average, Ephrata gets 0.19 inches of precipitation in August.
August is also the month where rain is least common. Only 6.1% of days in August will have measurable rain.
Month Precipitation % Chance
January 0.88 in 27.9
February 0.63 in 22.2
March 0.70 in 21.6
April 0.58 in 19.1
May 0.76 in 20.7
June 0.67 in 16.9
July 0.31 in 7.2
August 0.19 in 6.1
September 0.22 in 8.6
October 0.64 in 20.2
November 0.86 in 28.7
December 1.15 in 33.0
Year 7.51 in 19.2
Weather Station Details
Years Station Coordinates
1949–2024 Ephrata Municipal Airport location
1903–1948 Ephrata location
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