What to wear?

I am skipping work today so that I can pack and clean before I hit the training circuit.

What does one pack when going from Dallas to Chicago? I'm struck that the temperature change could be as much as 70degrees in one day. Layers I guess. And a wool coat?

Currently I am drinking coffee and plotting out my day.

Have to do:
-clean
-pack
-help Andy schedule children
-meet Mike for lunch :)
-print out documents for interview
-drop off friend Dave's camping mat that I borrowed in August
-go to interview
-go run a board of director's meeting

Flight leaves in the morning at 7:25am.
Arg.

Maybe I'll get this job and I won't have to do any national trips.
Could that even be possible????