I should have read your question better IrishGrl.

Your list is perfectly fine for casual wear.

NewbE, I live in South Carolina which is much hotter for a much longer part of the year than NYC and wear black pants year round.

Thanks for the replies. I was indeed talking about casual wear, I will likely have a dress code/uniform for work but am taking a smart outfit just in case.

I know NY is a lot hotter than Ireland (which wouldn't be hard - it's cold and raining here right now!). I have lived in Italy and wore jeans there in Rome, in summer, although I agree they aren't the most sensible choice. What about the evenings though? Does it cool down at all? In any case I'll probably wear a pair on the plane and bring another pair.

I'm 22, so I assume casual type stuff is OK. I have weirdly shaped feet and find most shoes/sandals uncomfortable so I was thinking of bringing my very padded, comfortable flip flops for daily wear as well as smarter shoes and sneakers. Do people wear those dark coloured Puma sneakers there or will I stand out as a Euro tourist? I'm thinking they are light to pack in the case, and suitable for both jogging and daily wear. They're probably therefore a better idea than Converse All stars, which have no support for your feet, and I don't own any other sneakers.

I don't intend to go out anywhere fancy, perhaps a moderately priced restaurant or a bar now and again. I don't have anything flashy or designer so I'm hoping all black with heels will be OK!

The laundry services seem a bit expensive. Are there many 'DIY' laundry places where you put in your own clothes and sit and wait until they're done? Or are they expensive too?

I think your ideas are right on. Many people will be wearing flip flops in the summer, and the Pumas sound perfect for when you need more support. The city doesn't cool down much at night because of all the concrete, and the main nuisance is the humidity, which makes it feel hotter. But of course it does cool down a bit, and the air conditioning indoors can be really cold, so an all-purpose cardigan, which you've listed, is nice to have. All black with heels will be just fine for going out, and you can be more casual than that at many places.

Sorry, can't help with the laundry questions...

Enjoy your stay--if you have time, let us know what you're seeing and doing that's fun.

I wouldn;t buy anything "new" since even your oldest clothes are going to seem "new" to newly-met people.

You will see absolutely EVERY KIND of clothing in New York...if you are even half as lovely as you sound what you wear will be totally irrelevant.

From observation of my 24-year-old daughter, jeans and "going out tops," ie, bare and dressier than a t-shirt, are the uniform of the young in bars and restaurants. She likes something with a heel in a going out shoe. I would say Pumas in every color are seen in NY. I suppose a coin laundry would be cheaper, I've just never seen one--they must exist, though? Maybe your building will have laundry facilities, if you are living in a bigger building.

summers are hot and humid, but can also be cool and rainy! prepare for both, and for moving from outdoor heat to indoor ac.

Ok thanks guys. Now I have an idea of what sort of clothing will be practical. It's tempting to bring all nice fashionable clothes but comfort is important in hot weather hehe and you have to consider that the stuff is going to be washed a lot. I'm sure I won't be able to resist buying a few items in NYC when I get there (so many nice things plus the US is really cheap for us right now) but I'm on a budget! Thanks for your help, I will definitely be posting soon about more important topics relating to my trip to NY!

IrishGrl, I wear my Pumas often in Manhattan and see them on others. You'll blend right in.

Pumas are very in- I have some myself-- though I am European and tend to prefer more dressy clothes than New Yorkers. You'll great!
In terms of weather- if the day is hot or warm, it will not cool down much for the night. I know exactly what you are asking- in Europe mornings and evenings are much cooler than midday. In New York, the early afternoon is the warmest part of day. Certainly bring a light jacket with you. However, if it is a 90 day, you will not be needing it!

You will have a great time! LL