Mid 50's for the ride in. It will be close to 90 for the ride home. I'm now a Cruiser Commuter!
I've used my Gary Fisher Wingra as my commuting bike for the last several years. It's a great bike, but last week I decided to try my Electra Zarape 3-speed cruiser, which I formerly only used for weekend rides with my lovely bride. I love the cruiser for commuting! At nearly 51, there is much less strain on my wrists, easier on the backside, and it climbs the moderate hills just fine. A crusier won't work for everyone; my ride is a little under 5 miles each way, and my route allows me to avoid tangling with too many cars. My office is about 200 feet lower elevation than my house, so the trip home is definitely more work than coming in, but not so much that it's daunting or exhausting. I don't care about speed, I like to just enjoy the ride, but the crusier is every bit as fast as the Gary Fisher, at least the way I ride.
(Couldn't resist another picture)