Chattanooga weather in September 2025

Expect 28°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Chattanooga in September. Check more long-term weather averages for Chattanooga in September before you book your next holiday to Tennessee in 2025/2026.

  • 28°C maximum daytime temperature in September in Chattanooga28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Chattanooga8
    8 days with some rainfall
  • 16°C minimum night-time temperature in September in Chattanooga16
    16°C min night temperature
  • 12 hours of daylight per day in September in Chattanooga12
    12 hours of daylight per day
  • Moderate heat & humidity in September in ChattanoogaM
    Moderate heat & humidity
  • 105 mm monthly rainfall in September in Chattanooga105
    105 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Chattanooga8
    8 (Very High) UV index

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The September weather guide for Tennessee (Chattanooga) 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 Chattanooga in September?

Daytime temperatures usually reach 28°C in Chattanooga in September with moderate heat and humidity, falling to 16°C at night.

How sunny is it in Chattanooga in September?

There are normally 8 hours of bright sunshine each day in Chattanooga in September - that's 61% of daylight hours.

Does it rain in Chattanooga in September?

There are usually 8 days with some rain in Chattanooga in September and the average monthly rainfall is 105mm.

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

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

Chattanooga September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:14 19:07
Monday, 15th September 2025 06:24 18:48
Tuesday, 30th September 2025 06:36 18:26

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