McKinney Weather Records

McKinney, Texas weather averages and records from 1903–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in McKinney, Texas was 118 °F which occurred on August 10, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in McKinney, Texas was -7 °F which occurred on January 18, 1930.
Lowest Temperatures: All-Time By Year
McKinney Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧
January 56.1 33.8 87 -7 2.8
February 60.1 37.6 95 -5 2.6
March 68.1 45.6 97 7 3.6
April 75.5 52.7 99 19 3.8
May 82.8 62.0 105 27 4.6
June 90.7 70.1 108 44 3.6
July 95.1 73.2 112 50 2.0
August 95.4 72.7 118 53 2.0
September 88.5 65.2 112 39 2.9
October 78.1 54.2 99 15 4.5
November 66.4 43.9 92 11 3.3
December 57.5 35.8 89 -4 3.3
Entire year 76.3 54.0 118 -7 39.1
More McKinney Weather Records
1903–2024
Highest daily low 88 °F August 7, 1942
Lowest daily high 8 °F February 13, 1905
Greatest daily range
(Difference of high and low)
60 °F January 20, 1985
Greatest difference in daily high
over two conscutive days
47 °F Dec 21–22, 1990
Most daily precipitation 12.1 inches September 21, 1964
Most monthly precipitation 21.6 inches September 1964
Most yearly precipitation 67.3 inches 2015
Most yearly days with precipitation 124 2004
Earliest freeze October 9 1917
Earliest day ≥ 90 °F February 10 1922
Earliest day ≥ 100 °F May 3 1920
Latest freeze May 1 1903
Latest day ≥ 90 °F November 8 1927
Latest day ≥ 100 °F September 30 1953
Most days in a year < 0 °F 1 2021
Most days in a year < 32 °F 73 1924
Most days in a year ≥ 80 °F 213 1922
Most days in a year ≥ 90 °F 139 1925
Most days in a year ≥ 100 °F 76 1934
Most days in a year ≥ 110 °F 7 1936
McKinney Weather Streaks
Most consecutive days...
With precipitation 14 days Apr 19 – May 2, 1957
Without precipitation 63 days Jun 16 – Aug 17, 1943
High temperature at or
below freezing
11 days Dec 19–29, 1983
High temperature ≥ 80 °F 164 days May 4 – Oct 14, 1956
High temperature ≥ 90 °F 116 days May 31 – Sep 23, 1980
High temperature ≥ 100 °F 64 days Jun 26 – Aug 28, 1934
High temperature ≥ 110 °F 6 days Aug 8–13, 1936
Plant Hardiness Zone
8A
McKinney is in plant hardiness zone 8A
based on average yearly minimum temperature from 1991–2020
McKinney Weather by Year
More McKinney Weather
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Weather Station Details
Years Station Coordinates
1999–2024 McKinney Municipal Airport location
1903–1998 McKinney Municipal Airport location