Oklahoma City Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Oklahoma City?

In Oklahoma City, May has the greatest precipitation of any month. On average, Oklahoma City gets 5.3 inches of precipitation in May.

May is also the month where rain is most common. 32.2% of days in May will have at least some rain.

What's the Driest Month in Oklahoma City?

In Oklahoma City, January has the least precipitation of any month. On average, Oklahoma City gets 1.31 inches of precipitation in January.

January is also the month where rain is least common. 16.2% of days in January will have measurable rain or snow.

Month	Precipitation	% Chance
January	1.31 in	16.2
February	1.41 in	19.9
March	2.55 in	22.4
April	3.60 in	26.3
May	5.30 in	32.2
June	4.49 in	28.7
July	3.59 in	19.2
August	3.60 in	21.7
September	3.71 in	23.6
October	3.32 in	24.3
November	1.68 in	19.4
December	1.79 in	18.3
Year	36.36 in	22.7

Weather Station Details

Years	Station	Coordinates
1948–2024	Oklahoma City Will Rogers Airport	location
1939–1947	Norman University of Oklahoma	location
1894–1938	Norman 3 SSE	location