McKinney Average Temperature by Month

This page shows the average temperature in each month of the year in McKinney, Texas. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in McKinney?
In McKinney, Texas, the warmest month is July, with an average daily high temperature of 95.1 °F and an average low of 73.2 °F.
What's the Coldest Month in McKinney?
In McKinney, Texas, the coolest month is January, with an average daily high temperature of 56.1 °F and an average low of 33.8 °F.
Month Avg. High Avg. Low
January 56.1 °F 33.8 °F
February 60.1 °F 37.6 °F
March 68.1 °F 45.6 °F
April 75.5 °F 52.7 °F
May 82.8 °F 62.0 °F
June 90.7 °F 70.1 °F
July 95.1 °F 73.2 °F
August 95.4 °F 72.7 °F
September 88.5 °F 65.2 °F
October 78.1 °F 54.2 °F
November 66.4 °F 43.9 °F
December 57.5 °F 35.8 °F
Year 76.3 °F 54.0 °F
Weather Station Details
Years Station Coordinates
1999–2024 McKinney Municipal Airport location
1903–1998 McKinney Municipal Airport location