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Monthly climate in McKinney, Texas, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification McKinney features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (46 °F) and 29 °C (84 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 1267 mm (49.9 inches) and receives 108 rainy days on the 1 mm (0.04 inches) threshold annually.McKinney enjoys an average of 3118 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in McKinney, Texas, United States §

The warmest months in McKinney are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (81 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (46 - 51 °F) throughout the day. On average each year, McKinney experiences 160 days above 25 °C (77.0 °F) and 23 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in McKinney, Texas, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 26°C
(78°F)		 29°C
(85°F)		 30°C
(87°F)		 33°C
(92°F)		 35°C
(95°F)		 37°C
(99°F)		 42°C
(107°F)		 39°C
(103°F)		 37°C
(99°F)		 34°C
(94°F)		 32°C
(90°F)		 27°C
(80°F)
Mean maximum 23°C
(74°F)		 26°C
(79°F)		 28°C
(83°F)		 30°C
(87°F)		 33°C
(91°F)		 35°C
(96°F)		 38°C
(100°F)		 37°C
(99°F)		 36°C
(97°F)		 33°C
(92°F)		 27°C
(81°F)		 24°C
(76°F)
Average high 13°C
(56°F)		 14°C
(58°F)		 21°C
(69°F)		 23°C
(74°F)		 28°C
(82°F)		 32°C
(89°F)		 34°C
(93°F)		 34°C
(93°F)		 31°C
(88°F)		 25°C
(77°F)		 19°C
(67°F)		 16°C
(61°F)
Daily mean 8°C
(46°F)		 9°C
(48°F)		 15°C
(59°F)		 18°C
(64°F)		 23°C
(73°F)		 27°C
(81°F)		 29°C
(84°F)		 29°C
(84°F)		 26°C
(79°F)		 19°C
(67°F)		 13°C
(56°F)		 10°C
(51°F)
Average low 3°C
(37°F)		 4°C
(39°F)		 10°C
(50°F)		 12°C
(54°F)		 18°C
(65°F)		 22°C
(72°F)		 24°C
(76°F)		 24°C
(75°F)		 21°C
(70°F)		 14°C
(58°F)		 7°C
(46°F)		 5°C
(42°F)
Mean minimum -7°C
(20°F)		 -6°C
(21°F)		 -0°C
(32°F)		 3°C
(38°F)		 11°C
(51°F)		 18°C
(65°F)		 21°C
(70°F)		 21°C
(70°F)		 14°C
(58°F)		 4°C
(39°F)		 -2°C
(30°F)		 -3°C
(27°F)
Minimum -13°C
(9°F)		 -19°C
(-2°F)		 -7°C
(20°F)		 0°C
(32°F)		 8°C
(46°F)		 15°C
(59°F)		 18°C
(65°F)		 19°C
(66°F)		 10°C
(50°F)		 1°C
(33°F)		 -6°C
(22°F)		 -6°C
(21°F)

Compare climate in McKinney with other places

Compare temperature, precipitation, sunshine, UV index in McKinney, Texas, United States with other places around the world.

Monthly average precipitation in McKinney, Texas, United States §

McKinney usually has the most precipitation in April, May and October, with an average of 10 rainy days and 160 mm (6.3 inches) of precipitation per month.The driest months in McKinney are January, July and November. On average, 60 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in McKinney, Texas, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 65 (2.6) 104 (4.1) 134 (5.3) 144 (5.7) 180 (7.1) 100 (4.0) 58 (2.3) 96 (3.8) 98 (3.8) 157 (6.2) 58 (2.3) 73 (2.9)
Average precipitation days (≥ 1 mm) 7 10 11 10 12 9 8 9 8 9 7 8

Monthly sunshine hours in McKinney, Texas, United States §

The sunniest months in McKinney are June, July and August, when the sun shines an average of 11 hours 6 minutes a day.Least sunny months in McKinney: January, February and December receive an average of 6 hours 6 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in McKinney, Texas, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 166 166 229 253 275 338 354 327 283 260 238 222
Mean daily daylight hours 10h 12m 10h 59m 11h 59m 13h 1m 13h 53m 14h 18m 14h 4m 13h 19m 12h 19m 11h 18m 10h 24m 9h 58m

Solar UV radiation in McKinney, Texas, United States §

McKinney experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly McKinney UV Index data.

Average daily maximum UV levels by month for McKinney, Texas, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 6 8 10 11 11 11 11 10 8 6 4