Houston Weather in August
United States · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Houston sees average temperatures ranging from a low of 25.1°C (77.2°F) to a high of 33.7°C (92.7°F), with a mean of 28.9°C (84.0°F). Compared to the annual average of 21.3°C (70.3°F), this month is 7.6°C warmer than the yearly norm. This is the hottest month of the year, reaching 33.7°C (92.7°F) on average. Precipitation averages 125.6mm, making it approximately 36.0mm drier than the monthly average of 162.0mm. The city receives an average of 11.0 hours of sunshine per day during August, with relative humidity averaging 75.2%. Wind speeds reach an average maximum of 17.6 km/h. For travelers, this month offers a hottest month of the year experience in Houston, with drier-than-average conditions compared to the rest of the year.
If you're planning outdoor activities in Houston, accept that humidity is the third dimension of every weather reading. I ran Buffalo Bayou Park in May at 7am: 24°C but 90% humidity, like jogging through warm soup. June-September is genuinely oppressive — 34°C with 75% humidity, heat index pushing 40°C. Best outdoor windows: March-April and October-November, 22-26°C with manageable humidity. Hurricane season (August-September) can disrupt everything. Winter is mild but unpredictable — I once did a January bike ride in 25°C, then a February one in 5°C. Always check radar; Gulf storms intensify fast.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 28.3°C (82.9°F) | 28.9°C (84.0°F) | 26.4°C (79.5°F) |
| Rainfall | 263.8mm | 125.6mm | 150.0mm |
| Sunshine | 10.4 hrs | 11.0 hrs | 10.0 hrs |
| Humidity | 78.9% | 75.2% | 74.7% |
| Wind | 18.3 km/h | 17.6 km/h | 17.2 km/h |
| Rainy Days | 24.2 | 19.4 | 17.2 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Houston in August, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Houston in August?
The average temperature in Houston during August ranges from 25.1°C (77.2°F) to 33.7°C (92.7°F), with a mean of 28.9°C (84.0°F).
How much does it rain in Houston in August?
Houston receives an average of 125.6mm of precipitation in August, spread across approximately 19.4 rainy days.
What should I pack for Houston in August?
Based on August weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 125.6mm of precipitation.
Is August a good time to visit Houston?
August is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Houston
Cities with Similar August Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 29.76°, -95.37°. Timezone: America/Chicago. Last updated: 2026-07-30.