Houston
Texas, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Houston, TX

A beautiful park in Root square overlooking the central business district of Houston, Texas
A beautiful park in Root square overlooking the central business district of Houston, Texas
August is the peak of summer in Houston with average temperatures in the hot zone of 75°F (23.9°C) to 95°F (35°C). The days are sunny and bright and mostly register highs above 90°F (32.2°C).
The warm air from the Gulf Coast keeps the conditions hot and humid for the majority of the day. Late evenings bring relief due to light breezes when the cloud cover is absent or minimal. The daily sunshine lasts for 8.5 hours as the daylight extends to 13 hours. August receives 3.8" (96.5mm) of rain, but an odd tornado may reach the doors of Houston.
Overall, it is best to avoid Houston in August.

What is the warmest month in Houston?

The warmest month is August, with an average high-temperature of 94.5°F (34.7°C) and an average low-temperature of 74.8°F (23.8°C).

What is the temperature in August in Houston?

In August, in Houston, the average high-temperature is 94.5°F (34.7°C), and the average low-temperature is 74.8°F (23.8°C).

What is the average humidity in August in Houston?

In Houston, the average relative humidity in August is 75.1%.

How many days does it rain in August in Houston?

In Houston, Texas, in August, during 8.3 rainfall days, 3.8" (95.5mm) of precipitation is typically accumulated.

How many hours of daylight does Houston have in August?

In Houston, Texas, the average length of the day in August is 13.2h.

How long on average sun shines in August in Houston?

The average sunshine in August in Houston is 8.7h.

How high is the UV index in August in Houston?

The average daily maximum UV index in August in Houston, Texas, is 10. A UV Index value of 8 to 10 symbolizes a very high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in August - Houston, TX
  • Average high temperature in August: 94.5°F

The warmest month (with the highest average high temperature) is August (94.5°F).
The month with the lowest average high temperature is January (62.9°F).

  • Average low temperature in August: 74.8°F

The month with the highest average low temperature is July (75.1°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).

Average humidity in August - Houston, TX
  • Average humidity in August: 75.1%

The month with the highest relative humidity is September (76.8%).
The month with the lowest relative humidity is March (72.7%).

Average rainfall in August - Houston, TX
  • Average rainfall in August: 3.8"

The wettest month (with the highest rainfall) is June (5.9").
The driest month (with the lowest rainfall) is February (3.2").

Average rainfall days in August - Houston, TX
  • Average rainfall days in August: 8.3 days

The month with the highest number of rainy days is June (10.6 days).
The month with the lowest number of rainy days is April (6.8 days).

Average daylight in August / Average sunshine in August - Houston, TX
  • Average daylight in August: 13.2h

The month with the longest days is June (Average daylight: 14h).
The month with shortest days is December (Average daylight: 10.3h).

  • Average sunshine in August: 8.7h

The month with most sunshine is July (Average sunshine: 9.5h).
The month with least sunshine is January (Average sunshine: 4.6h).

Average UV index in August - Houston, TX
  • Average UV index in August: 10

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).