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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?
McKinney, TX gets 38.3 in of precipitation a year over about 90 rainy days. August is the warmest month (average high 96°F) and January the coldest (average low 34°F).
Humid subtropical climate
McKinney, TX has hot summers and mild winters. Daytime highs range from about 56°F in January to 96°F in August. May is usually the wettest month. 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 | 35° | 58° |
| Spring | Mar–May | 54° | 75° |
| Summer | Jun–Aug | 72° | 94° |
| Autumn | Sep–Nov | 55° | 78° |
How much rain does McKinney get?
McKinney gets 38.3 in of precipitation in an average year, spread over about 90 days with measurable rain. That is more rainy days than 51% of the US.
May is the wettest month, with 4.8 in. August is the driest, with 1.7 in. May has the most rainy days, about 11.
The longest dry spell in the last five years lasted 40 days, to October 15, 2022.
From October 2025 to September 2026 McKinney got 34.2 in of rain, against a normal of 38.3 in for those months. 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.
McKinney weather by month
McKinney weather in January
In January, McKinney averages a high of 56°F and a low of 34°F. It gets 2.7 in of precipitation over about 6 rainy days. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The January record high is 82°F (2006) and the record low is 7°F (2018).
McKinney weather in February
In February, McKinney averages a high of 60°F and a low of 37°F. It gets 2.6 in of precipitation over about 7 rainy days. 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 -4°F (2021).
McKinney weather in March
In March, McKinney averages a high of 68°F and a low of 46°F. It gets 3.5 in of precipitation over about 9 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The March record high is 92°F (2026) and the record low is 13°F (2002). March is one of the most comfortable months to visit.
McKinney weather in April
In April, McKinney averages a high of 75°F and a low of 53°F. It gets 3.6 in of precipitation over about 8 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The April record high is 98°F (2006) and the record low is 28°F (2009). April is one of the most comfortable months to visit.
McKinney weather in May
In May, McKinney averages a high of 83°F and a low of 62°F. It gets 4.8 in of precipitation over about 11 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The May record high is 101°F (2003) and the record low is 35°F (2013).
McKinney weather in June
In June, McKinney averages a high of 91°F and a low of 70°F. It gets 3.6 in of precipitation over about 8 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The June record high is 104°F (2012) and the record low is 54°F (2000).
McKinney weather in July
In July, McKinney averages a high of 95°F and a low of 73°F. It gets 2.0 in of precipitation over about 5 rainy days. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The July record high is 111°F (1998) and the record low is 58°F (2013).
McKinney weather in August
In August, McKinney averages a high of 96°F and a low of 73°F. It gets 1.7 in of precipitation over about 5 rainy days. Estimated sunshine is 62% of daylight hours, derived from ERA5 cloud cover. The August record high is 109°F (2011) and the record low is 54°F (2004).
McKinney weather in September
In September, McKinney averages a high of 89°F and a low of 66°F. It gets 2.8 in of precipitation over about 7 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The September record high is 112°F (2000) and the record low is 41°F (2000).
McKinney weather in October
In October, McKinney averages a high of 78°F and a low of 54°F. It gets 4.4 in of precipitation over about 8 rainy days. Estimated sunshine is 67% of daylight hours, derived from ERA5 cloud cover. The October record high is 97°F (2019) and the record low is 28°F (2008). October is one of the most comfortable months to visit.
McKinney weather in November
In November, McKinney averages a high of 67°F and a low of 44°F. It gets 3.2 in of precipitation over about 8 rainy days. Estimated sunshine is 57% of daylight hours, derived from ERA5 cloud cover. The November record high is 91°F (2017) and the record low is 19°F (2019). November is one of the most comfortable months to visit.
McKinney weather in December
In December, McKinney averages a high of 57°F and a low of 35°F. It gets 3.5 in of precipitation over about 7 rainy days. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The December record high is 86°F (2005) and the record low is 6°F (2005).
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%.
Wind averages 8 mph over the year, and April is the windiest month at 10 mph.
McKinney has about 99 days a year above 90°F. McKinney is hotter than 92% of the US.
Thunderstorms occur on about 50 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 1998–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the McKinney station is 112°F, on September 4, 2000. The coldest is -4°F, on February 16, 2021.
The wettest day in the available station history brought 6.5 in of precipitation, on November 27, 2015.
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 35°F.
Spring (March–May) is warm, with average highs around 75°F and lows near 54°F.
Summer (June–August) is hot, with average highs around 94°F and lows near 72°F.
Autumn (September–November) is warm, with average highs around 78°F and lows near 55°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Wind | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|---|
| January | 34° | 56° | 2.7 in | 6 | 9 mph | 62% | 51% | 82° | 7° |
| February | 37° | 60° | 2.6 in | 7 | 9 mph | 63% | 45% | 91° | -4° |
| March | 46° | 68° | 3.5 in | 9 | 10 mph | 62% | 44% | 92° | 13° |
| April | 53° | 75° | 3.6 in | 8 | 10 mph | 62% | 43% | 98° | 28° |
| May | 62° | 83° | 4.8 in | 11 | 9 mph | 70% | 37% | 101° | 35° |
| June | 70° | 91° | 3.6 in | 8 | 8 mph | 66% | 53% | 104° | 54° |
| July | 73° | 95° | 2.0 in | 5 | 7 mph | 61% | 58% | 111° | 58° |
| August | 73° | 96° | 1.7 in | 5 | 6 mph | 55% | 62% | 109° | 54° |
| September | 66° | 89° | 2.8 in | 7 | 6 mph | 59% | 64% | 112° | 41° |
| October | 54° | 78° | 4.4 in | 8 | 7 mph | 56% | 67% | 97° | 28° |
| November | 44° | 67° | 3.2 in | 8 | 8 mph | 65% | 57% | 91° | 19° |
| December | 35° | 57° | 3.5 in | 7 | 8 mph | 65% | 51% | 86° | 6° |
Station: MCKINNEY MUNI AP, 3 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1998–2026; 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 much rain does McKinney get?
McKinney gets 38.3 in of precipitation in an average year, over about 90 rainy days.
What is the wettest month in McKinney?
May is the wettest month in McKinney, with 4.8 in. August is the driest, with 1.7 in.
How many rainy days does McKinney have a year?
McKinney has about 90 days with measurable rain in an average year. May has the most, about 11.
What is the hottest month in McKinney?
August is the warmest month in McKinney, with an average high of 96°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 1998–2026 station history, the record high at the McKinney station is 112°F, set on September 4, 2000. The record low is -4°F, on February 16, 2021.
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.