Louisiana weather in September 2025

Expect daytime maximum temperatures of 30°C in Louisiana, USA in September and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 147 mm of rainfall in the month.

  • 30°C maximum daytime temperature in September in Louisiana (New Orleans)30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in September in Louisiana (New Orleans)10
    10 days with some rainfall
  • 22°C minimum night-time temperature in September in Louisiana (New Orleans)22
    22°C min night temperature
  • 12 hours of daylight per day in September in Louisiana (New Orleans)12
    12 hours of daylight per day
  • High heat & humidity in September in Louisiana (New Orleans)H
    High heat & humidity
  • 147 mm monthly rainfall in September in Louisiana (New Orleans)147
    147 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Louisiana (New Orleans)9
    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.

Top Louisiana destinations

Below are average maximum temperatures at popular countries, regions and places in Louisiana in September. Select a holiday destination to see more weather parameters.

All Louisiana destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Louisiana in September?

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

How sunny is it in Louisiana in September?

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

Does it rain in Louisiana in September?

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

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

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

Louisiana September sunrise & sunset times

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

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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