Pullman Average Rainfall by Month

This page shows the average precipitation (including snowfall) in each month of the year in Pullman, Washington. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Pullman?

In Pullman, November has the greatest precipitation of any month. On average, Pullman gets 2.7 inches of precipitation in November.

November is also the month where rain is most common. 45.4% of days in November will have at least some rain or snow.

What's the Driest Month in Pullman?

In Pullman, July has the least precipitation of any month. On average, Pullman gets 0.44 inches of precipitation in July.

August is the month with the lowest chance of precipitation. 11.3% of days in August will have measurable rain.

Month	Precipitation	% Chance
January	2.48 in	43.0
February	1.93 in	41.7
March	2.15 in	39.7
April	1.89 in	37.1
May	1.79 in	31.1
June	1.21 in	27.7
July	0.44 in	12.1
August	0.49 in	11.3
September	0.65 in	15.2
October	1.77 in	29.0
November	2.69 in	45.4
December	2.72 in	44.2
Year	20.05 in	31.4

Weather Station Details

Years	Station	Coordinates
1940–2024	Pullman 2 Nw	location