August weather forecast
Lewisville, TX

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Weather in August

August sees a slight drop in temperatures from the scorching heat of July, yet still stands out as one of the hottest months of the year. Conversely, humidity drops to its lowest levels of the year at 53%, giving residents a brief respite. Moreover, winds show a declining trend with speeds dropping to an average of 7mph (11.3km/h). As summer draws to a close, the weather starts transitioning towards the milder autumn temperatures of September.

Temperature

August is the warmest month of the year, registering average temperatures as high as 96.3°F (35.7°C) and as low as 76.8°F (24.9°C).

Heat index

The heat index value for August is computed to be a blisteringly hot 111.2°F (44°C). Mind: Heat cramps along with heat exhaustion are anticipated. Heatstroke can develop with continued physical activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

August is the least humid month, with an average relative humidity of 53%.

Rainfall

In Lewisville, in August, during 11.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, in Lewisville, there are 132.1 rainfall days, and 29.09" (739mm) of precipitation is accumulated.

Snowfall

In Lewisville, snow does not fall in April through October.

Daylight

In Lewisville, the average length of the day in August is 13h and 20min.
On the first day of the month, sunrise is at 6:41 am and sunset at 8:26 pm. On the last day of August, sunrise is at 7:02 am and sunset at 7:53 pm CDT.

Sunshine

The months with the most sunshine are July and August, with an average of 11h of sunshine.

UV index

The months with the highest UV index in Lewisville are May through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during August leads to these instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What is the hottest time of year in Lewisville?

August, with its high-temperature average of 96.3°F (35.7°C) and a low-temperature average of 76.8°F (24.9°C), is the warmest month in Lewisville.

How hot does it get in Lewisville in August?

An average high-temperature, in August, in Lewisville, is 96.3°F (35.7°C) and the average low-temperature is 76.8°F (24.9°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is computed to be 111.2°F (44°C).

What is the least humid month in Lewisville?

With an average relative humidity of 53%, August is the least humid month in Lewisville, Texas.

What is the average humidity in August in Lewisville?

In August, the average relative humidity is 53%.

How many days does it rain in August in Lewisville?

In Lewisville, Texas, during August, the rain falls for 11.3 days and regularly aggregates up to 2.17" (55mm) of precipitation.

When it does not snow in Lewisville?

April through October are months without snowfall in Lewisville.

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

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

What time are sunrise and sunset in August in Lewisville?

In August, on the first day of the month, sunrise is at 6:41 am and sunset at 8:26 pm. On the last day of the month, in Lewisville, sunrise is at 7:02 am and sunset at 7:53 pm CDT.

What is the month with the most sunshine in Lewisville?

The months with the most sunshine in Lewisville are July and August, with an average of 11h of sunshine.

How many hours of sunshine does Lewisville have in August?

In August, the average sunshine duration is 11h.

What is the month with the highest UV index in Lewisville?

May through August, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index reading in August in Lewisville?

In August, the average daily maximum UV index in Lewisville, Texas, is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
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
Lewisville, TX

Average temperature in August - Lewisville, TX
  • Average high temperature in August: 96.3°F

The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in August: 76.8°F

The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).

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Average pressure in August
Lewisville, TX

Average pressure in August - Lewisville, 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 (29.9"Hg).

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Average wind speed in August
Lewisville, TX

Average wind speed in August - Lewisville, TX
  • Average wind speed in August: 7mph

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

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Average humidity in August
Lewisville, TX

Average humidity in August - Lewisville, TX
  • Average humidity in August: 53%

The month with the highest relative humidity is May (71%).
The month with the lowest relative humidity is August (53%).

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Average rainfall in August
Lewisville, TX

Average rainfall in August - Lewisville, TX
  • Average rainfall in August: 2.17"

The wettest month (with the highest rainfall) is October (3.74").
The driest months (with the least rainfall) are January and February (1.57").

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Average rainfall days in August
Lewisville, TX

Average rainfall days in August - Lewisville, TX
  • Average rainfall days in August: 11.3 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (6.6 days).

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Average snowfall in August
Lewisville, TX

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

The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
Lewisville, TX

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

The month with the highest number of snowfall days is February (1.1 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
Lewisville, TX

Average daylight in August / Average sunshine in August - Lewisville, 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 0min

The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in August
Lewisville, TX

Average sunshine days in August - Lewisville, TX
  • Average sunshine days in August: 17.9 days

The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is September (14.9 days).

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Average UV index in August
Lewisville, TX

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

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

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Average cloud cover in August
Lewisville, TX

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

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in August
Lewisville, TX

Average visibility in August - Lewisville, 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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Lewisville, Texas, USA

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