Weather in New Orleans in September 2025
Average weather
Average temperature in New Orleans in September
Going from a maximum of +95°F during the day to a minimum of +73°F during the night, the temperature in September averages around +90°F.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +90°F to +88°F.
Is New Orleans warm or cold in September?
New Orleans is typically warm in September.
Maximum temperatures go down compared to the previous month from +88°F to +84°F. The minimum temperature also goes down from +77°F to +73°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in New Orleans:
Water temperature in New Orleans in September
Water in New Orleans in September is Warm. It varies from +78°F to +86°F, with an average of +82°F. This is almost similar to the air temperature, which averages +84°F.
In September, water temperatures are average relative to the rest of the year:
Can you swim in New Orleans in September?
Climate in New Orleans in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +88°F | +84°F | +79°F | ||||
| Min. temperature | ||||||
| +66°F | +55°F | +39°F | ||||
| Max. temperature | ||||||
| +102°F | +97°F | +93°F | ||||
| Rainfall | ||||||
| 198 mm | 139 mm | 89 mm | ||||
| Wind | ||||||
| 1 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +86°F | +82°F | +76°F | ||||
| Humidity | ||||||
| 80% | 79% | 77% | ||||
| Air pressure | ||||||
| 1014 HPa | 1014 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 3 | 6 | 11 | ||||
| Cloudy days | ||||||
| 2 | 3 | 7 | ||||
| Rainy days | ||||||
| 26 | 20 | 13 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +88°F in the day, the average maximum temperature lowers to +84°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 198 mm to 139 mm. It feels drier, as humidity decreases from 80% to 79%. Winds are stronger in comparison to August, going up from 1 m/s to 2 m/s on average. The good news is there are likely to be more sunny days in September, from 3 to 6.
But maybe it is worth considering traveling in October as the weather gets better.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in New Orleans is gradually increasing during September, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in New Orleans?
Climate Change Over the Years
The climate in New Orleans in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+73°F) and the highest in 2023 (+80°F). The driest year was 2000 with only 955 mm of rainfall, and the wettest year was 2022 with 58691 mm.
FAQ
Is September a good time to visit New Orleans?
Can you sunbathe in New Orleans in September?
Can you swim in New Orleans in September?
Is New Orleans rainy in September?
Is it sunny in New Orleans in September?
Other cities in USA
Monthly weather in New Orleans
Source of the data
For this page, we’ve looked at the typical weather in New Orleans, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.