New Orleans in February: 19°C / 66°F afternoons, 10°C / 50°F nights, about 9 rain days, and Carnival's last week before Ash Wednesday on the 10th.
Dress for the longest days of Carnival. NOAA NCEI's normals for the airport put February at 19.1°C by afternoon and 9.8°C at night, with 4.13 inches of rain on about 9 days and one freezing night to January's three. Parade week stretches that whole range across a single day. Zulu steps off at 8am on Mardi Gras, about an hour after sunrise, and Endymion leaves Mid-City at 4pm on the 6th and rolls on past a 5:40pm sunset. You stand through all of it, so the capsule is layers you shed rather than a coat: a dark indigo trucker, an ecru sweatshirt over a long-sleeve tee, olive waxed trousers and waterproof sneakers, with one Carnival colour in a plum beanie.
Carnival ends in February the way it began in January, on a curb, only the days are longer: a dawn start for Zulu, an afternoon at 19°C, a float passing in the dark at 10°C. Then Ash Wednesday, and the city goes quiet.

Button it at seven on Mardi Gras morning and open it by noon. Zulu steps off at 8am, about an hour after a 6:46am sunrise, while NOAA NCEI's daily normal is still close to its 9.2°C low, and the afternoon then climbs to 18.5°C. Denim blocks the wind along a parade route without trapping heat, and the two flap pockets button over cash and an ID in a crowd.

Fleece rather than wool, because a parade curb means spilled drinks and king-cake icing, and this goes straight in the washing machine. It is the middle layer: under the trucker for Muses at 6pm on Thursday 4 February, off and tied round your waist when the afternoon reaches 19°C / 66°F. Ecru keeps the look light against dark denim and olive.

NOAA NCEI counts about 12 February afternoons at 21°C / 70°F or warmer, against 9 in January, and the daily normal high climbs from 17.7°C on the 1st to 20.6°C on the 28th. Wear this tee alone with the olive trousers on those afternoons. In parade week it sits under the sweatshirt, so taking the sweatshirt off at 2pm still leaves you in sleeves when the sun goes at 5:40pm.

Waxed canvas sheds the shower you get on about 9 February days and wipes clean after an afternoon sitting on a curb. New Orleans & Company's Mardi Gras FAQ warns that the neutral ground turns muddy after rain, and mud brushes off wax where it soaks into denim. A straight five-pocket leg falls over the sneakers instead of tucking into a boot, so the same pair sits at a restaurant table after Ash Wednesday.

New Orleans & Company's Mardi Gras FAQ asks for close-toed shoes, and a cushioned sneaker is the one closed shoe that lasts through all of Endymion, which puts 3,200 riders on 81 floats. Waterproofed leather handles the 3 February days that bring half an inch of rain or more. Cream matches the sweatshirt, and the grey panels at toe and heel hide the curb.

Wear it across your body and slide it to the front when the floats arrive. Both hands stay free for throws, and a flap over the opening is what you want in a crowd standing shoulder to shoulder. Waxed canvas matches the trousers and shrugs off a shower, and there is room inside for the folded poncho, a phone and cash.

A poncho, not an umbrella, is the rain plan on a parade route. An open umbrella blocks the view of everyone behind you; a poncho covers you and the crossbody and leaves both arms out for throws. The airport's normals give February about 3 days with half an inch of rain or more, so it rides folded in the bag all week.

One Carnival colour is enough when the rest of the capsule is ecru, indigo and olive. Purple is one of the three that New Orleans & Company's Mardi Gras FAQ encourages, and a beanie is the smallest way to wear it: on your head for Zulu's 8am start, in the crossbody by eleven. Deep plum rather than bright violet reads as a choice, not a costume.
Ecru tee and ecru sweatshirt · indigo trucker, buttoned · olive waxed trousers · cream sneakers · plum beanie · olive crossbody with the poncho folded inside. Mardi Gras, Tuesday 9 February: Zulu steps off at 8am, about an hour after sunrise, and Rex follows at 10:30am.
Same trousers and sneakers · trucker open over the sweatshirt · beanie back on after dark. Endymion leaves Mid-City at 4pm on Saturday 6 February and rolls past a 5:40pm sunset into a night heading for 10°C / 50°F; Bacchus steps off at 5:15pm on the Sunday.
A suggested look — dark indigo denim trucker jacket, ecru fleece sweatshirt, dark olive waxed canvas trousers, cream and grey sneakers, deep plum ribbed beanie.
Mild by afternoon, cool at dawn and a little drier than January. NOAA NCEI's normals for Louis Armstrong New Orleans International Airport give February an average high of 19.1°C / 66°F and a low of 9.8°C / 50°F. Rain totals 4.13 inches on about 9 days; 5.7 of those bring a tenth of an inch and about 3 bring half an inch or more. Freezing nights fall to about 1 a month, against about 3 in January, and about 12 afternoons reach 70°F. Daylight grows from 10h 45m on 1 February to 11h 29m on the 28th.
A dark indigo denim trucker jacket, an ecru fleece sweatshirt, a plain ecru long-sleeve tee, dark olive waxed-canvas trousers, cream waterproof sneakers, an olive waxed-canvas crossbody, a deep indigo rain poncho and a deep plum beanie. That covers a 10°C / 50°F dawn on Mardi Gras morning, a 19°C / 66°F afternoon on a curb and a night parade after a 5:40pm sunset. Leave the umbrella and the heavy winter coat at home, and wear one Carnival colour rather than a purple, green and gold set.
Mardi Gras Day is Tuesday 9 February 2027, with Lundi Gras on the 8th and Ash Wednesday on the 10th. The largest parades crowd into the days before it. New Orleans & Company lists Muses Uptown at 6pm on Thursday 4 February, Endymion from Mid-City at 4pm on Saturday 6 February, Bacchus at 5:15pm on Sunday 7 February, and Zulu at 8am on Mardi Gras morning, with Rex behind it at 10:30am. Dress each day for both ends of it: the trucker buttoned over the sweatshirt at a 10°C / 50°F dawn, the sweatshirt off by a 19°C / 66°F afternoon, close-toed sneakers throughout, and the crossbody worn at the front so both hands stay free.
Before Mardi Gras if you want the parades; after Ash Wednesday if you want the city. From Muses on 4 February to Mardi Gras on the 9th, parades roll every night of Carnival's final week, which means crowds and long hours on a curb. Ash Wednesday, 10 February, starts Lent and the floats stop, so the second half of the month is quieter and a little warmer: NOAA NCEI's daily normals move the high from 18.5°C on Mardi Gras to 20.6°C on the 28th, and sunset from 5:43pm to 5:58pm. Pack the same capsule either way; after the 10th, the tee does more of the work.
Warmer by about 2°C day and night, and a little drier. On NOAA NCEI's normals for the same airport station, January gives 17°C / 63°F afternoons and 8°C / 46°F nights with 5.18 inches of rain on about 10 days; February gives 19°C / 66°F and 10°C / 50°F with 4.13 inches on about 9. Freezing nights drop from about 3 to about 1, and afternoons at 70°F or warmer rise from about 9 to about 12. Our January guide dresses Twelfth Night in purple, green and gold with rubber boots; February keeps one plum accent and trades the boots for waterproof sneakers, because the parade days run longer and drier.
Parade clothes: jeans or work trousers, a sweatshirt, a jacket and sneakers, with one Carnival colour, while the floats do the dressing up. The all-women Krewe of Muses, rolling Uptown at 6pm on Thursday 4 February 2027, is known for throwing hand-decorated shoes, and Endymion puts 3,200 riders on 81 floats two nights later. For Zulu's 8am start, the local name to wear is KREWE, which began in 2013 selling sunglasses from a cart on a bike at New Orleans festivals; the brow bridge on its St. Louis frame is modelled on the wrought-iron balconies of the French Quarter.