Average temperatures, rainfall and packing tips for Houston, United States in September
September in Houston is typically hot, with average daytime highs around 31°C and nights near 22°C. Temperature-wise it sits mid-range for Houston (the 4th warmest month).
September is one of the wetter months in Houston, with around 125 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Houston are usually February, March, April, May, October, November and December.
← Houston weather tomorrow (live)
In September, Houston averages a daytime high of about 31°C and a night-time low of around 22°C, based on recent historical data.
September is one of the wetter months in Houston, with around 125 mm of rain - plan around showers.
September is a workable time to visit Houston, with hot days - just pack accordingly. If your dates are flexible, the most comfortable months in Houston are usually February, March, April, May, October, November and December.