Will I be hot?
Will I be hot in New Orleans in September?
Verdict
Yes — Yes, hot.
Highs push 88°F — sun exposure and hydration matter more than layering.
Day vs. night
Day
88°F
Hot
Prioritize shade, hydration, and a brim.
Night
73°F
Warm
Still warm enough for a T-shirt after dark.
Why
New Orleans in September averages highs of 88°F, lows of 73°F, 11 rainy days.
Prioritize breathable fabrics, sun protection, and hydration over any kind of layering piece.