I'm taking a trip in a couple of weeks to visit some family/friends in the US. This will involve a lot of working from home during the day and a few brunches and dinners out, so pretty casual. But I've also been chatting with someone via email for about a position in their lab (I'm in academia) and when I mentioned I'd be in town, they suggested I come out for a visit to chat and "see the campus."
So, basically, it's a job interview but the way the request was made was more casual/unofficial. Showing up in a suit would be overkill (especially since academics tend to be less formal to begin with). In addition, it'll be around 30C/86F and I'll be taking public transit, so I don't want to show up an overheated mess.
Any suggestions for what I should wear to look professional without overdoing it? My business casual wardrobe is pretty minimal, but I have a few pairs of trousers and some pencil skirts. And jackets are bulky to pack and hot, but I could bring one if needed. Thanks for your help!