August weather forecast
McKinney, TX

Weather in August

August, the last month of the summer in McKinney, is also a hot month, with temperature in the range of an average low of 75.2°F (24°C) and an average high of 94.8°F (34.9°C).

Temperature

August is the warmest month, with an average high-temperature of 94.8°F (34.9°C) and an average low-temperature of 75.2°F (24°C).

Heat index

In August, the average heat index is calculated to be an extremely hot 111.2°F (44°C). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like metabolic differences, wind, differences in body mass, height, and shape, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

With an average relative humidity of 59%, August is the least humid month.

Rainfall

In McKinney, in August, it is raining for 12.8 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 144.7 rainfall days, and 33.54" (852mm) of precipitation is accumulated.

Snowfall

In McKinney, Texas, snow does not fall in March through October.

Daylight

In McKinney, the average length of the day in August is 13h and 20min.
On the first day of August in McKinney, sunrise is at 6:39 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 7:53 pm CDT.

Sunshine

The month with the most sunshine in McKinney is August, with an average of 11.1h of sunshine.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index in McKinney. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in August transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in McKinney?

With an average high-temperature of 94.8°F (34.9°C) and an average low-temperature of 75.2°F (24°C), August is the warmest month.

What is the temperature in August in McKinney?

In August, the average high-temperature is 94.8°F (34.9°C), and the average low-temperature is 75.2°F (24°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 111.2°F (44°C).

What is the least humid month in McKinney?

With an average relative humidity of 59%, August is the least humid month in McKinney.

What is the average humidity in August in McKinney?

In McKinney, Texas, the average relative humidity in August is 59%.

How much does it rain in McKinney in August?

In McKinney, Texas, in August, during 12.8 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

When it does not snow in McKinney?

In McKinney, Texas, snow does not fall in March through October.

What is the average length of the day in August in McKinney?

In McKinney, Texas, the average day length in August is 13h and 20min.

What time are sunrise and sunset in August in McKinney?

In August, on the first day of the month, sunrise is at 6:39 am and sunset at 8:26 pm. On the last day of the month, in McKinney, Texas, sunrise is at 7:00 am and sunset at 7:53 pm CDT.

What month has the most sunshine in McKinney?

The month with the most sunshine in McKinney, Texas, is August, with an average of 11.1h of sunshine.

How long on average sun shines in August in McKinney?

In McKinney, Texas, the average sunshine duration in August is 11.1h.

What are the months with the highest UV index in McKinney?

June through August, with an average maximum UV index of 7, are months with the highest UV index in McKinney, Texas.

How high is the UV index in August in McKinney?

In McKinney, Texas, the average daily maximum UV index in August is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
McKinney, TX

Average temperature in August - McKinney, TX
  • Average high temperature in August: 94.8°F

The warmest month (with the highest average high temperature) is August (94.8°F).
The month with the lowest average high temperature is January (53.2°F).

  • Average low temperature in August: 75.2°F

The month with the highest average low temperature is August (75.2°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).

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Average pressure in August
McKinney, TX

Average pressure in August - McKinney, TX
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
McKinney, TX

Average wind speed in August - McKinney, TX
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).

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Average humidity in August
McKinney, TX

Average humidity in August - McKinney, TX
  • Average humidity in August: 59%

The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in August
McKinney, TX

Average rainfall in August - McKinney, TX
  • Average rainfall in August: 2.64"

The wettest month (with the highest rainfall) is October (4.17").
The driest month (with the least rainfall) is January (1.77").

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Average rainfall days in August
McKinney, TX

Average rainfall days in August - McKinney, TX
  • Average rainfall days in August: 12.8 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in August
McKinney, TX

Average snowfall in August - McKinney, TX
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.71").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

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Average snowfall days in August
McKinney, TX

Average snowfall days in August - McKinney, TX
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
McKinney, TX

Average daylight in August / Average sunshine in August - McKinney, TX
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in August: 11h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in August
McKinney, TX

Average sunshine days in August - McKinney, TX
  • Average sunshine days in August: 15.8 days

The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is September (13.6 days).

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Average UV index in August
McKinney, TX

Average UV index in August - McKinney, TX
  • Average UV index in August: 7

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in August
McKinney, TX

Average cloud cover in August - McKinney, TX
  • Average cloud cover in August: 20

The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in August
McKinney, TX

Average visibility in August - McKinney, TX
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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