New Orleans weather in September
New Orleans in September averages 27°C (81°F) and 128 mm of rain.
Of the twelve months in New Orleans, September is the fourth warmest and the sixth driest.
- Average temp
- 27°C (81°F)
23–31°C · 73–88°F
- Rainfall
- 128 mm
Showers likely
- Sunshine
- —
- Wind
- 11 km/h
What is New Orleans like in September?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for New Orleans in September?
High-factor sun cream
With daytime highs around 31°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 128 mm falls this month — showers rather than washouts.
September compared with August and October
September in New Orleans is 1.6°C cooler than August and 52 mm drier than it, which averages 29°C (83°F).
September in New Orleans is 4.7°C warmer than October and 34 mm wetter than it, which averages 22°C (72°F).
Daylight in New Orleans in September
On 15 September the sun is up for 12 hours 20 minutes in New Orleans, rising about 06:45 and setting about 19:04 local time.
September ends 51 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 44 minutes short of June, the longest-lit month here.
Where to stay in New Orleans
Dates are a starting point for September.
Travel guides for New Orleans
What to read before you book.
New Orleans weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 12°C / 54°F | 132 mm |
| February | 14°C / 58°F | 104 mm |
| March | 18°C / 64°F | 111 mm |
| April | 21°C / 70°F | 132 mm |
| May | 25°C / 77°F | 143 mm |
| June | 28°C / 82°F | 194 mm |
| July | 29°C / 83°F | 169 mm |
| August | 29°C / 83°F | 180 mm |
| September | 27°C / 81°F | 128 mm |
| October | 22°C / 72°F | 94 mm |
| November | 17°C / 62°F | 98 mm |
| December | 14°C / 56°F | 123 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about New Orleans in September
September climate averages for New Orleans, 1991–2020.
New Orleans averages 27°C (81°F) in September, ranging from about 23°C (73°F) at night to 31°C (88°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 128 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 27°C (81°F) against 22°C (72°F) in October — 4.7°C warmer.
September is 1.6°C cooler than August, and 52 mm drier.
It is outside the easiest window. The most comfortable stretch here is March to May; September sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 20 minutes of daylight in mid-September, against 14 hours 4 minutes in June and 10 hours 14 minutes in December.
On 15 September, sunrise is about 06:45 and sunset about 19:04 local time. Both shift across the month — the month ends 51 minutes shorter than it starts.
