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McKinney, TX Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in McKinney, TX?
July is the warmest month (average high 95°F) and January the coldest (average low 34°F).
McKinney climate at a glance
McKinney, TX has hot summers and mild winters. Daytime highs range from about 56°F in January to 95°F in August. The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 72°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 36° | 58° |
| Spring | Mar–May | 53° | 75° |
| Summer | Jun–Aug | 71° | 93° |
| Autumn | Sep–Nov | 54° | 77° |
How much rain does McKinney get?
McKinney has about 67 days with measurable rain in an average year. That is fewer rainy days than 70% of the US.
The longest dry spell in the last five years lasted 33 days, to October 28, 2024.
From September 2025 to August 2026 McKinney got 35.6 in of rain. May 2026 had the most, with 6.6 in.
See where McKinney ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Texas.
Does it snow in McKinney?
The snowiest winter on record is 1977–78, with 14.1 in.
The most recent measurable snow at the station fell on January 10, 2025.
See where McKinney ranks: snowiest cities in the US.
McKinney weather by month
McKinney weather in January
In January, McKinney averages a high of 56°F and a low of 34°F. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The January record high is 82°F (1970) and the record low is 5°F (1982).
McKinney weather in February
In February, McKinney averages a high of 61°F and a low of 37°F. Estimated sunshine is 45% of daylight hours, derived from ERA5 cloud cover. The February record high is 91°F (2024) and the record low is 2°F (1978).
McKinney weather in March
In March, McKinney averages a high of 68°F and a low of 45°F. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The March record high is 96°F (1974) and the record low is 13°F (1980). March is one of the most comfortable months to visit.
McKinney weather in April
In April, McKinney averages a high of 76°F and a low of 52°F. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The April record high is 100°F (2006) and the record low is 19°F (1991). April is one of the most comfortable months to visit.
McKinney weather in May
In May, McKinney averages a high of 82°F and a low of 62°F. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The May record high is 99°F (1985) and the record low is 40°F (1990).
McKinney weather in June
In June, McKinney averages a high of 89°F and a low of 69°F. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The June record high is 108°F (1980) and the record low is 50°F (1970).
McKinney weather in July
In July, McKinney averages a high of 95°F and a low of 73°F. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The July record high is 109°F (1998) and the record low is 53°F (1970).
McKinney weather in August
In August, McKinney averages a high of 95°F and a low of 72°F. Estimated sunshine is 62% of daylight hours, derived from ERA5 cloud cover. The August record high is 107°F (1986) and the record low is 53°F (1989).
McKinney weather in September
In September, McKinney averages a high of 88°F and a low of 64°F. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The September record high is 109°F (1998) and the record low is 39°F (1983).
McKinney weather in October
In October, McKinney averages a high of 78°F and a low of 53°F. Estimated sunshine is 67% of daylight hours, derived from ERA5 cloud cover. The October record high is 97°F (1977) and the record low is 24°F (1993). October is one of the most comfortable months to visit.
McKinney weather in November
In November, McKinney averages a high of 66°F and a low of 44°F. Estimated sunshine is 57% of daylight hours, derived from ERA5 cloud cover. The November record high is 89°F (2005) and the record low is 15°F (1976). November is one of the most comfortable months to visit.
McKinney weather in December
In December, McKinney averages a high of 58°F and a low of 36°F. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The December record high is 88°F (2005) and the record low is -4°F (1989).
Sunshine, humidity and wind in McKinney
October is the sunniest month in McKinney, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 37%. The annual cloud-cover estimate is 53% of daylight hours; it is not a measurement of sunshine duration. McKinney is sunnier than 69% of the US.
Humidity peaks in May at 70% and is lowest in August at 55%.
McKinney has about 88 days a year above 90°F. McKinney is hotter than 88% of the US.
Thunderstorms occur on about 37 days a year.
See where McKinney ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in McKinney
The first fall freeze in McKinney typically comes around November 11, and the last spring freeze around March 17. That leaves a frost-free growing season of about 239 days.
McKinney weather records
These records cover MCKINNEY MUNI AP during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the McKinney station is 109°F, on July 12, 1998. The coldest is -4°F, on December 23, 1989.
The wettest day in the available station history brought 7.8 in of precipitation, on May 13, 1982.
41 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.2°F per decade since 1970.
The best time to visit McKinney
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 72°F.
Winter (December–February) is mild, with average highs around 58°F and lows near 36°F. Snow is possible.
Spring (March–May) is warm, with average highs around 75°F and lows near 53°F.
Summer (June–August) is hot, with average highs around 93°F and lows near 71°F.
Autumn (September–November) is warm, with average highs around 77°F and lows near 54°F.
Monthly climate
| Month | Average low | Average high | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|
| January | 34° | 56° | 7 | 62% | 51% | 82° | 5° |
| February | 37° | 61° | 5 | 63% | 45% | 91° | 2° |
| March | 45° | 68° | 7 | 62% | 44% | 96° | 13° |
| April | 52° | 76° | 6 | 62% | 43% | 100° | 19° |
| May | 62° | 82° | 8 | 70% | 37% | 99° | 40° |
| June | 69° | 89° | 6 | 66% | 53% | 108° | 50° |
| July | 73° | 95° | 4 | 61% | 58% | 109° | 53° |
| August | 72° | 95° | 4 | 55% | 62% | 107° | 53° |
| September | 64° | 88° | 5 | 59% | 64% | 109° | 39° |
| October | 53° | 78° | 5 | 56% | 67% | 97° | 24° |
| November | 44° | 66° | 6 | 65% | 57% | 89° | 15° |
| December | 36° | 58° | 6 | 65% | 51% | 88° | -4° |
Station: MCKINNEY MUNI AP, 3 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
McKinney climate questions
How many rainy days does McKinney have a year?
McKinney has about 67 days with measurable rain in an average year. May has the most, about 8.
What is the hottest month in McKinney?
July is the warmest month in McKinney, with an average high of 95°F.
What is the coldest month in McKinney?
January is the coldest month in McKinney, with an average low of 34°F.
What is the record high temperature in McKinney?
Within the available 1970–2026 station history, the record high at the McKinney station is 109°F, set on July 12, 1998. The record low is -4°F, on December 23, 1989.
What is the sunniest month in McKinney?
October is the sunniest month in McKinney, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. May is the cloudiest.
When is the first frost in McKinney?
The first fall freeze in McKinney typically comes around November 11. The last spring freeze is around March 17.
What is the best time to visit McKinney?
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 72°F.