McKinney Average Rainfall by Month

This page shows the average precipitation in each month of the year in McKinney, Texas. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in McKinney?
In McKinney, May has the greatest precipitation of any month. On average, McKinney gets 4.6 inches of precipitation in May.
May is also the month where rain is most common. 32.5% of days in May will have at least some rain.
What's the Driest Month in McKinney?
In McKinney, August has the least precipitation of any month. On average, McKinney gets 1.96 inches of precipitation in August.
August is also the month where rain is least common. 16.3% of days in August will have measurable rain.
Month Precipitation % Chance
January 2.80 in 23.4
February 2.65 in 24.0
March 3.61 in 27.1
April 3.79 in 27.8
May 4.64 in 32.5
June 3.55 in 26.1
July 1.96 in 16.7
August 1.96 in 16.3
September 2.94 in 21.2
October 4.50 in 23.4
November 3.31 in 23.9
December 3.35 in 22.2
Year 39.15 in 23.7
Weather Station Details
Years Station Coordinates
1999–2024 McKinney Municipal Airport location
1903–1998 McKinney Municipal Airport location
© H Brothers Inc, 2021–2024
Contact us | Privacy policy