Houston weather in August
In August, Houston has an average high of 35 °C94 °F and an average low of 24 °C75 °F, with about 125 mm4.9 in of precipitation. August is the warmest month of the year and ranks 3rd for precipitation.
How August compares with other months
Compared with July, August is 0.5 °C1 °F warmer on average and wetter by 15 mm0.6 in. Compared with September, August is 2.8 °C5.1 °F warmer on average and wetter by 7 mm0.3 in. Daylight lasts about 13.2 hours around the middle of the month. Average relative humidity is 72% and the average cloud amount 44%.
Is August a good time to visit Houston?
August is not among the most comfortable months by our comfort score: it is hot (average high 35 °C94 °F) and it is fairly wet (125 mm4.9 in). The most comfortable months in Houston are February–April and November.
What to wear in August
For Houston in August, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Houston | 3594 | 2475 | 1254.9 |
| Pasadena | 3290 | 2679 | 1666.5 |
| Beaumont | 3392 | 2476 | 1686.6 |
| College Station | 3696 | 2475 | 903.5 |
| Austin | 3798 | 2476 | 632.5 |
| Waco | 3697 | 2476 | 652.6 |
| Killeen | 3697 | 2474 | 612.4 |
| Tyler | 3596 | 2374 | 732.9 |
| Corpus Christi | 3494 | 2578 | 552.2 |
Nearby places that are more than 1 °C1.8 °F warmer in August: Austin.
Other months in Houston
- January16 °C61 °F / 5 °C41 °F
- February19 °C65 °F / 7 °C45 °F
- March23 °C73 °F / 11 °C52 °F
- April26 °C80 °F / 15 °C59 °F
- May31 °C87 °F / 19 °C67 °F
- June34 °C92 °F / 23 °C73 °F
- July34 °C93 °F / 24 °C75 °F
- August35 °C94 °F / 24 °C75 °F
- September32 °C89 °F / 21 °C70 °F
- October28 °C82 °F / 16 °C60 °F
- November22 °C72 °F / 10 °C51 °F
- December18 °C64 °F / 6 °C43 °F
Frequently asked questions
How warm is Houston in August?
In August the average high in Houston is 35 °C (94 °F) and the average low is 24 °C (75 °F).
Does it rain a lot in Houston in August?
On average about 125 mm (4.9 in) of precipitation falls in August; it ranks 3rd of the 12 months.
Is August the warmest month in Houston?
Yes. August is the warmest month in Houston. The coldest month is January, with an average low of 5 °C (41 °F).
How long is the day in Houston in August?
In the middle of August the day in Houston lasts about 13.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Houston in August?
The average relative humidity in August is about 72%. Combined with warm days, it can feel muggy.
How cloudy is Houston in August?
On average about 44% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.