If the weather's not playing nicely, why not head to Civic Museum of the Middle Ages? You'll be fascinated by just how many interesting facts you can discover about the past here.
You'll soon discover why this Historic Center collection of historical artifacts is a hit with travelers. If you're looking for other things to keep you busy, Piazza Maggiore, Stadio Renato Dall'Ara, and University of Bologna are in the area as well. They won't take very long to reach from Civic Museum of the Middle Ages.