Houston weather in September 2026

Expect daytime maximum temperatures of 86°F in Houston, Texas in September and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 4.8 inches of rainfall in the month.

  • 86°F maximum daytime temperature in September in Houston86
    86°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Houston9
    9 days with some rainfall
  • 70°F minimum night-time temperature in September in Houston70
    70°F min night temperature
  • 12 hours of daylight per day in September in Houston12
    12 hours of daylight per day
  • High heat & humidity in September in HoustonH
    High heat & humidity
  • 4.8 inches monthly rainfall in September in Houston4.8
    4.8 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Houston9
    9 (Very High) UV index

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The September weather guide for Texas (Houston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Houston in September?

Daytime temperatures usually reach 90°F in Houston in September with high heat and humidity, falling to 68°F at night.

How sunny is it in Houston in September?

There are normally 8 hours of bright sunshine each day in Houston in September - that's 63% of daylight hours.

Does it rain in Houston in September?

There are usually 8 days with some rain in Houston in September and the average monthly rainfall is 3.5 inches.

What is the chance of a hurricane in Houston in September?

On average less than 1 day in September in Houston is likely to be affected by the passage of one or more tropical storms.

Houston September sunrise & sunset times

Browse the sunrise and sunset times for Houston in September 2026. Select a month to view Houston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:59 18:44
Tuesday, 15th September 2026 06:06 18:27
Wednesday, 30th September 2026 06:14 18:08

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