New Orleans weather in September 2025

Q: 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.

Q: 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.

Q: 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.

Q: What is the chance of a cyclone 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.

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
30°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
22
22°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
147
147 mm of monthly rainfall
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.

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

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.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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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Louisiana - quick facts
Flight time^✝	10 hours
Time difference	UK -6 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Culture
Tourist info	Louisiana Office of Tourism