McKinney, TX Weather by Month and Climate Averages

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.

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. The sun is out about 51% of daylight hours. 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. The sun is out about 45% of daylight hours. 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. The sun is out about 44% of daylight hours. 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. The sun is out about 43% of daylight hours. 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. The sun is out about 37% of daylight hours. 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. The sun is out about 53% of daylight hours. 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. The sun is out about 58% of daylight hours. 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. The sun is out about 62% of daylight hours. 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. The sun is out about 64% of daylight hours. 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. The sun is out about 67% of daylight hours. 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. The sun is out about 57% of daylight hours. 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. The sun is out about 51% of daylight hours. 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 sunshine about 67% of daylight hours. May is the cloudiest, at 37%. Over the year the sun shines about 53% of daylight hours. 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

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 on record brought 7.8 in of rain, 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.

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?

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 sunshine about 67% of daylight hours. 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.