Most Monthly Precipitation in McKinney History

This is a list of the largest monthly precipitation totals ever recorded in McKinney, Texas history from 1903–2024.

What Was the Wettest Month in McKinney History?

According to NOAA records, the most precipitation that McKinney, Texas has ever received in a single month is 21.6 inches which occurred in September 1964.

Month to date though April 25, 2024: 3.8 inches

McKinney Most Rain in One Month

Rank	Precipitation	Month
1	21.6 inches	September 1964
2	16.7 inches	May 1982
3	15.6 inches	April 1966
4	14.9 inches	May 1905
5	14.8 inches	May 2015
6	14.4 inches	April 1957
7	14.0 inches	November 2015
8	12.6 inches	May 1957
9	12.5 inches	October 2009
10	12.4 inches	September 2018
11	12.3 inches	July 1960
12	12.1 inches	June 1989
13	11.9 inches	January 1932
14	11.5 inches	June 2007
15	11.3 inches	October 2018
16	11.0 inches	April 1922
17	11.0 inches	July 1926
18	11.0 inches	October 1991
19	10.9 inches	July 1905
20	10.8 inches	November 1946