Climateby Month

McKinney, TX climate by month

NOAA 1991-2020 normals · 630 ft elevation

Summers in McKinney are hot and humid; winters are cool. Highs peak at 96°F in August and fall to 56°F in January. Wet days are spread through the year, from about 5 to 9 a month. Normal snowfall is about 2.6 in a year. The most comfortable time to visit is March and April.

Warmest month
96°F
August normal high
Coldest month
34°F
January normal low
Wet days a year
84
42.1 in of precipitation
Snow a year
2.6 in
normal snowfall

How warm is McKinney?

Normal highs range from 56°F in January to 96°F in August.

20°40°60°80°100° January: normal high 56°F (13°C), low 34°F (1°C) 56° 34° February: normal high 60°F (16°C), low 38°F (3°C) March: normal high 68°F (20°C), low 46°F (8°C) April: normal high 75°F (24°C), low 53°F (12°C) May: normal high 83°F (28°C), low 62°F (17°C) June: normal high 91°F (33°C), low 70°F (21°C) July: normal high 95°F (35°C), low 74°F (23°C) August: normal high 96°F (36°C), low 73°F (23°C) 96° 73° September: normal high 88°F (31°C), low 66°F (19°C) October: normal high 78°F (26°C), low 54°F (12°C) November: normal high 66°F (19°C), low 44°F (7°C) December: normal high 57°F (14°C), low 36°F (2°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is McKinney?

May has the most wet days (about 9); the year brings about 42 in of precipitation.

January: 7 wet days February: 8 wet days March: 8 wet days April: 7 wet days May: 9 wet days 9 June: 8 wet days July: 5 wet days 5 August: 6 wet days September: 6 wet days October: 7 wet days November: 6 wet days December: 7 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 2.6 in a year, most of it in February.

January: 0.2 in of snow February: 1.3 in of snow 1.3 March: 0.4 in of snow April: 0.0 in of snow 0.0 May: 0.0 in of snow June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 0.1 in of snow December: 0.6 in of snow JFMAMJJASOND

How humid is McKinney?

Muggy days peak in July, at about 27 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 3 muggy days May: 13 muggy days June: 24 muggy days July: 27 muggy days 27 August: 24 muggy days September: 14 muggy days October: 5 muggy days November: 1 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Dallas/Ft Worth International Airport, 31 mi SW of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 10.0 hours in December to 14.3 hours in June.

January: 10.2 hours of daylight February: 11.0 hours of daylight March: 12.0 hours of daylight April: 13.0 hours of daylight May: 13.9 hours of daylight June: 14.3 hours of daylight 14.3 July: 14.1 hours of daylight August: 13.3 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.5 hours of daylight December: 10.0 hours of daylight 10.0 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for McKinney, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 56°F34°F 2.6 in7 0.2 in 0 10.2 h
February 60°F38°F 3.0 in8 1.3 in 0 11.0 h
March 68°F46°F 3.8 in8 0.4 in 0 12.0 h
April 75°F53°F 3.9 in7 0.0 in 3 13.0 h
May 83°F62°F 5.3 in9 0.0 in 13 13.9 h
June 91°F70°F 3.9 in8 0.0 in 24 14.3 h
July 95°F74°F 2.6 in5 0.0 in 27 14.1 h
August 96°F73°F 2.7 in6 0.0 in 24 13.3 h
September 88°F66°F 2.9 in6 0.0 in 14 12.4 h
October 78°F54°F 5.0 in7 0.0 in 5 11.3 h
November 66°F44°F 3.0 in6 0.1 in 1 10.5 h
December 57°F36°F 3.3 in7 0.6 in 0 10.0 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit McKinney

By our comfort score, the best months are March and April.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 53843
Feb 581052
Mar 681650
Apr 701550
May 55575
Jun 410520
Jul 370327
Aug 360427
Sep 432415
Oct 601253
Nov 641540
Dec 53842

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in McKinney

The last spring frost typically comes around Mar 18, and the first fall frost around Nov 11, leaving 239 frost-free days in a typical year.

Frost and freeze dates for McKinney
Typical date1 year in 10
Last spring frost (32°F)Mar 18after Apr 7
First fall frost (32°F)Nov 11before Oct 27
Last hard freeze (28°F)Mar 4after Mar 22
First hard freeze (28°F)Nov 24before Nov 6
Frost-free season239 daysunder 211 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Mckinney Muni Airport (USW00053914), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Texas.

Hottest and coldest readings, 1991-2020

The highest reading was 112°F (September 4, 2000); the lowest was 6°F (December 9, 2005).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near McKinney

Similar climates elsewhere

Where the numbers come from

  • Temperature and frost dates: Mckinney Muni Airport (USW00053914), 1.9 mi SE of the city center, 580 ft (50 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Rain, snowfall and snow depth: Frisco (USC00413370), 10 mi W of the city center, 747 ft (117 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 31 mi SW of the city center, 560 ft (70 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 31 mi SW of the city center, 544 ft (86 ft lower than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error