Houston weather in August
August in Houston: sweltering, rainy — a fair time to visit.
#12 of 12 months in Houston · #494 of 604 destinations to visit in August · comfort 59/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Houston climate normals — August
| Daytime high | 34°C / 93°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 39°C / 102°F | |
| Rainfall | 103 mm / 4.1 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 13.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 65 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Houston in August — FAQ
- Is August a good time to visit Houston?
- August in Houston: sweltering, rainy — a fair time to visit. It ranks #12 of 12 months for Houston on SeasonMap's comfort score (59/100).
- What is the weather like in Houston in August?
- In August, Houston averages a daily high of 34.1°C and a low of 25.5°C, with about 103 mm of rain over roughly 16.2 rainy days.
- What is the air quality in Houston in August?
- Houston has a mean US Air Quality Index of about 65 in August.