What should I wear to an interview to be a teaching professor?

In general, you don't want to be less dressed up than the people you're being interviewed by (except for the president or dean, if you're meeting with them, who will always seem completely overdressed to be on a college campus). Unfortunately, what that means may depend on your field. In my field, biology, and I think in most other science fields, you are describing perfectly appropriate interview clothes. I basically wore the same thing that you're describing to all my interviews, substituting brown or grey slacks for the skirts. However, fields vary in their dressiness. Certainly in business, everybody seems to wear suits all the time, even at the suburban commuter school where I teach. And in many of the humanities and social sciences, women especially seem to wear suits to interviews. It may also depend on where you are: if you were interviewing here in Atlanta in July, we would be surprised if you showed up in a black wool suit and hose. My impression from my own interviews is that other parts of the country (the northeast) are more formal.

I think what you've described sounds fine. If you're worried about the monochrome issue, wear/find a bright piece of jewelry; a necklace, a bracelet, etc. Or let your shoes be the pop of color. No hose. Alternatively, keep the white shell and black blazer and find a more summery skirt. Something red or orange or purple would be great. I'd especially get a new skirt if your only skirt options are wool and/or tweed.

this isn't an interview to be a full professor, so it'll be 2 hours or so rather than 2 days long What's the nature of the job? Because if this boils down to adjuncting or some other variety of casual employment, I wouldn't spend much money on interview clothes. I don't think it makes much sense to spend $200 on clother for an interview where the only semi-guaranteed pay is a few grand in one semester.

Nthing that the outfit you're describing is perfectly appropriate.

Thank you for the advice! I tried on the skirts and they're just slightly too small. I'm thinking of a Target or JCP run to grab a new skirt. Academichic rec'd a nice bag, so I'll be checking out Target, JCP and Nordstrom Rack. The position is for a 9 month renewable contract, where I'd be teaching 3 or 4 courses per semester. My advantages are that I've got career experience in the subjects I'd be teaching and that I've already taught one of the courses - I wrote it from scratch for the past semester. One disadvantage, I don't have a PhD.

I would use your meeting last Spring as guidance for your level of dress now. What was the dressiest thing that was worn at your meeting in the Spring? Certainly, you don't want to be less dressy than that. Since, as you say, this is a more formal interview than before, I'd maybe go even one level of dressyness further than that. Knowing how to read the nature of the place is key. For example, for my current job, I was interviewing at a liberal arts school in the sciences, so I quickly figured out that anything north of jeans was going to be fine for the interview.

I think the bag you linked to is too informal and will clash with the outfit you've described. Ideally you want to carry something that will fit a writing pad or portfolio comfortably, including materials you may be handed during the interview, such as a folder with school information. A leather tote bag in black would be the most unobtrusive choice, but if that's not within your budget, a plain nylon briefcase will also work.