New Orleans weather in September
September in New Orleans: sweltering, rainy — a good time to visit.
#9 of 12 months in New Orleans · #495 of 604 destinations to visit in September · comfort 63/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
New Orleans climate normals — September
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 112 mm / 4.4 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 21°C / 70°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 12.3 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 55 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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New Orleans in September — FAQ
- Is September a good time to visit New Orleans?
- September in New Orleans: sweltering, rainy — a good time to visit. It ranks #9 of 12 months for New Orleans on SeasonMap's comfort score (63/100).
- What is the weather like in New Orleans in September?
- In September, New Orleans averages a daily high of 29.5°C and a low of 24.1°C, with about 112.2 mm of rain over roughly 11.6 rainy days.
- What is the air quality in New Orleans in September?
- New Orleans has a mean US Air Quality Index of about 55 in September.