New Orleans weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in New Orleans in September. Check more long-term weather averages for New Orleans in September before you book your next holiday to Louisiana in 2025/2026.

  • 30°C maximum daytime temperature in September in New Orleans30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in September in New Orleans10
    10 days with some rainfall
  • 22°C minimum night-time temperature in September in New Orleans22
    22°C min night temperature
  • 12 hours of daylight per day in September in New Orleans12
    12 hours of daylight per day
  • High heat & humidity in September in New OrleansH
    High heat & humidity
  • 147 mm monthly rainfall in September in New Orleans147
    147 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in New Orleans9
    9 (Very High) UV index

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The September weather guide for Louisiana (New Orleans) 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 New Orleans in September?

Daytime temperatures usually reach 30°C in New Orleans in September with high heat and humidity, falling to 22°C at night.

How sunny is it in New Orleans in September?

There are normally 8 hours of bright sunshine each day in New Orleans in September - that's 62% of daylight hours.

Does it rain in New Orleans in September?

There are usually 10 days with some rain in New Orleans in September and the average monthly rainfall is 147mm.

What is the chance of a hurricane in New Orleans in September?

On average 1.2 days in September in New Orleans are likely to be affected by the passage of one or more tropical storms.

New Orleans September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:38 18:22
Monday, 15th September 2025 05:45 18:05
Tuesday, 30th September 2025 05:53 17:47

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