What to wear

I have been to Paris many times and it attracts tourists from all over the world, including from cultures that don't dress like what you see in America or the western Christian world, and no one cares. No one will be paying attention to what you are wearing except for maybe pickpockets. Dress casual and comfortable like you do when you are at home but wear either a money belt or a something under your clothes to conceal your valuables. Google "Paris 7 day weather forecast" a couple a days before you leave or look up the historical averages for May and pack according to that. Here is what the weather was like last year May 2024
https://www.timeanddate.com/weather/france/paris/historic?month=5&year=2024

When is your trip? What you wear in summer is different than winter.
Look at the search feature for packing reports to help you decide. Sweat pants and logo clothes are no-no. Jeans are heavy to pack. Pack for a week and do wash along the way.
Casual is fine. Mix and match to get the most out of what you pack and layer for warmth. No need to dress up.

Sorry I just saw that you’ll be in Paris next week.

It is just my thoughts but I would not wear sweatpants or jeans. Too bulky to pack. If you want to dress up a little for dinner go for it. I just take a pair of nice slacks ad some skirts. Then you can just add a nice scarf. Wear what shoes you are comfortable with and short sleeve shirts with a light sweater. Pack minimally and you will be fine and certainly fit in. Weather looks good for next week mid 70s and low of 49 at night mostly sunny.

Nobody is going to be paying attention to what you wear. Of course you can dress up a bit for dinner, and you can wear jeans during the day. The cute dress is great if that makes you happy, but everything is really weather dependent. I'm not sure what super casual means to you, but it's not 1950's in Paris. You are tourists doing tourist things. I couldn't tell you what anyone was wearing in Paris last spring when we were there. I'd pack according to the weather forecast.

Last week it varied from a normal low 50 to an unusual 80. Next week shows more normal low 50s at night and mid to high 70s almost 80. Paris is only 2 hours to the ocean, currents are in fluctuation, so dress in layers. I had a t-shirt, under a long sleeve blouse under a light jacket and a wool cardigan ready to throw on under the jacket in the evening.
I wore black jeans or black slacks. One pair of Teva hiking sandals and one pair Brooks trail running shoes.
If you don’t have a small umbrella that fits in your purse, buy one there as a souvenir. More expensive but also more durable.
No sweats in Paris.

The era of the French dressing with elegance is over. 10 of the 12 people near you on the metro in fall or spring will be in jeans (or maybe some sort of sports pants ). I wouldn't wear sweat pants but anything else goes. I wear black jeans and carry one pair of lightweight pants for hot weather. In summer I'd mostly be wearing skirts or linen.

Wear what you are comfortable with. Dressing up a little for the opera or dinner is common and fine but mostly have wardrobe that mixes and matches and is comfortable and pack as light as you can especially if you will be doing any further train travel.

Leave the sweatpants at home. If it’s chilly, wear jeans, comfortable walking shoes or sneakers. If it’s warm enough, wear your pretty summer dress and take a jean jacket. I always dress up in the evening, so do other people! I love to. I bring a Silver block heel ankle strap sandal that looks wonderful with dresses or pants. I also bring a fancy studded flat sandal if we are going somewhere casual, but I don’t want to wear my day shoes.

I do think for the most part, people look nicer there in the daytime. Not as much athleisure wear.

Just check the weather apps before you go. I like to look put together even if I’m in black or blue jeans.

Thank you all, Appreciate all the responses!

The only people dressing up anymore are influencers fighting to get their Instagram shot, and then rapidly moving on to the next. Ordinary people wear ordinary clothes, just a little nicer than you'd see at a Walmart. Think H&M or Zara. Easy on the sports logos.

phred

I would hope people would dress better than " just a little nicer than you'd see at a Walmart". That bar is pretty low.

You can easily dress comfortably and put together without resorting to sweatpants in a city environment.

A cute dress or nice jeans/slacks at dinner is perfect.

Weather in Paris is looking good for next week. Have a great trip!

I disagree people don’t dress up. When we were there 2 years ago, I saw lots of summer dresses on all age groups People looked really nice.

Do NOT wear sweats unless you have a nice sweatshirt (check out Athleta.com) that will keep you warm on your bike ride. Might also be nice to wear on the train if it's chilly. Otherwise, you will be comfortable and look sharp with jeans, stretchy black or khaki pants and simple tops/sweaters. I'd wear short sleeve tees and add a sweater or sweatshirt. White or black sneakers for the day and a small heel for an evening out,

The French dress simply, but smart and sharp. Basics, as I've suggested, with a sweet kerchief or other pop of color and you won't look like the Griswolds!
Enjoy!

Not Paris, but just back from Rome. My impression is that sneakers have conquered the fashion world, even as accessories for “cute dresses.” There are plenty of options for slightly dressier flat shoes with good walking soles, as well.
I am not a pack light fanatic, but I wouldn’t consider including a pair of shoes that might get only 1 or 2 wearings. 2 pairs, 1 in case of rain or other mishap, 1 in case of foot issues, rubbing, blisters, etc.