August weather forecast
Houston, TX

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A beautiful park in Root square overlooking the central business district of Houston, Texas, USA
A beautiful park in Root square overlooking the central business district of Houston, Texas, USA

Weather in August

Following the peak of summer in July, August sees a continued prevalence of the sweltering heat in Houston. Nonetheless, Houston's citizens and visitors continue to enjoy the outdoors, albeit in a slightly shorter and more relaxed fashion. As August progresses, the heat begins to taper off hinting towards the end of the summer months. However, Houston continues to bask in the sunlight with the temperature soaring to a high of 94.3°F. The month of August offers the residents of Houston a final chance to make the most of the summer season before cooler weather starts setting in.

Temperature

In Houston, August is the warmest month, with temperatures averaging a high of 94.3°F and a low of 77.5°F.

Heat index

August's average heat index is calculated to be a burning hot 120.2°F. Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

August and October, with an average relative humidity of 70%, are the least humid months.

Rainfall

In Houston, during August, the rain falls for 19.1 days and regularly aggregates up to 3.9" of precipitation. Throughout the year, in Houston, there are 180.5 rainfall days, and 35.35" of precipitation is accumulated.

Snowfall

February through November are months without snowfall.

Daylight

The average length of the day in August in Houston is 13h and 11min.
On the first day of the month, sunrise is at 6:40 am and sunset at 8:14 pm. On the last day of August, in Houston, sunrise is at 6:58 am and sunset at 7:45 pm CDT.

Sunshine

The month with the most sunshine is August, with an average of 10.5h of sunshine.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Houston, Texas. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: An average UV index of 7 in August transforms into this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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FAQ

What part of the year is the hottest in Houston?

August, marked by an average high-temperature of 94.3°F and a low-temperature of 77.5°F, is the warmest month in Houston, Texas.

How hot does it get in Houston in August?

In August, the average high-temperature and low-temperature in Houston, Texas, are 94.3°F and 77.5°F respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 120.2°F.

What are the least humid months in Houston?

The months with the lowest humidity in Houston are August and October, with an average relative humidity of 70%.

What is the average humidity in August in Houston?

The average relative humidity in August in Houston, Texas, is 70%.

How much does it rain in Houston in August?

In Houston, in August, during 19.1 rainfall days, 3.9" of precipitation is typically accumulated.

When it does not snow in Houston?

February through November are months without snowfall in Houston, Texas.

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

The average day length in August in Houston, Texas, is 13h and 11min.

When are sunrise and sunset in August in Houston?

In August, on the first day of the month, sunrise is at 6:40 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 7:45 pm CDT.

What month has the most sunshine in Houston?

August has the most sunshine of the year in Houston, with an average of 10.5h of sunshine.

How many hours of sunshine does Houston have in August?

The average sunshine duration in August is 10.5h.

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

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

What is the UV index intensity in August in Houston?

The average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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
Houston, TX

Average temperature in August - Houston, TX
  • Average high temperature in August: 94.3°F

The warmest month (with the highest average high temperature) is August (94.3°F).
The month with the lowest average high temperature is January (61.3°F).

  • Average low temperature in August: 77.5°F

The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (46°F).

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Average pressure in August
Houston, TX

Average pressure in August - Houston, TX
  • Average pressure in August: 29.95"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Houston, TX

Average wind speed in August - Houston, TX
  • Average wind speed in August: 6.2mph

The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).

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Average humidity in August
Houston, TX

Average humidity in August - Houston, TX
  • Average humidity in August: 70%

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are August and October (70%).

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Average rainfall in August
Houston, TX

Average rainfall in August - Houston, TX
  • Average rainfall in August: 3.9"

The wettest month (with the highest rainfall) is September (4.49").
The driest month (with the least rainfall) is February (1.77").

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Average rainfall days in August
Houston, TX

Average rainfall days in August - Houston, TX
  • Average rainfall days in August: 19.1 days

The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is January (11.8 days).

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Average snowfall in August
Houston, TX

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

The month with the highest snowfall is December (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
Houston, TX

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

The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in August / Average sunshine in August - Houston, TX
  • Average daylight in August: 13h and 1min

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

  • Average sunshine in August: 10h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

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Average sunshine days in August
Houston, TX

Average sunshine days in August - Houston, TX
  • Average sunshine days in August: 9.6 days

The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is September (7.9 days).

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Average UV index in August
Houston, TX

Average UV index in August - Houston, 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
Houston, TX

Average cloud cover in August - Houston, TX
  • Average cloud cover in August: 27

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in August
Houston, TX

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

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