Brownsville weather in September 2025

Expect 90°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Brownsville in September. Check more long-term weather averages for Brownsville in September before you book your next holiday to Texas in 2025/2026.

  • 90°F maximum daytime temperature in September in Brownsville90
    90°F max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in September in Brownsville10
    10 days with some rainfall
  • 73°F minimum night-time temperature in September in Brownsville73
    73°F min night temperature
  • 12 hours of daylight per day in September in Brownsville12
    12 hours of daylight per day
  • Very high heat & humidity in September in BrownsvilleVH
    Very High heat & humidity
  • 5.7 inches monthly rainfall in September in Brownsville5.7
    5.7 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Brownsville10
    10 (Very High) UV index

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The September weather guide for Texas (Brownsville) 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 Brownsville in September?

Daytime temperatures usually reach 90°F in Brownsville in September with very high heat and humidity, falling to 73°F at night.

How sunny is it in Brownsville in September?

There are normally 8 hours of bright sunshine each day in Brownsville in September - that's 67% of daylight hours.

Does it rain in Brownsville in September?

There are usually 10 days with some rain in Brownsville in September and the average monthly rainfall is 5.7 inches.

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

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

Brownsville September sunrise & sunset times

Browse the sunrise and sunset times for Brownsville in September 2025. Select a month to view Brownsville sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:10 18:49
Monday, 15th September 2025 06:16 18:34
Tuesday, 30th September 2025 06:22 18:17

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