Dallas weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Dallas in September. Check more long-term weather averages for Dallas in September before you book your next holiday to Texas in 2025/2026.

  • 31°C maximum daytime temperature in September in Dallas31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 7 days with some rainfall in September in Dallas7
    7 days with some rainfall
  • 20°C minimum night-time temperature in September in Dallas20
    20°C min night temperature
  • 12 hours of daylight per day in September in Dallas12
    12 hours of daylight per day
  • High heat & humidity in September in DallasH
    High heat & humidity
  • 83 mm monthly rainfall in September in Dallas83
    83 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Dallas8
    8 (Very High) UV index

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The September weather guide for Texas (Dallas) 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 / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Dallas in September?

Daytime temperatures usually reach 31°C in Dallas in September with high heat and humidity, falling to 20°C at night.

How sunny is it in Dallas in September?

There are normally 8 hours of bright sunshine each day in Dallas in September - that's 66% of daylight hours.

Does it rain in Dallas in September?

There are usually 7 days with some rain in Dallas in September and the average monthly rainfall is 83mm.

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

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

Dallas September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:02 18:51
Monday, 15th September 2025 06:11 18:33
Tuesday, 30th September 2025 06:21 18:13

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