Rain is warm, and a sign of spring. It's not snow or ice which is typical to see a bit for at least the first half of April. In southeast Michigan we've had unseasonably warm weather, the trees and flowers all bloomed early, and people are talking about mowing since weeks ago. Typically you wouldn't plant anything until at least Mother's Day.
A few years ago we did "no mow May." The grass is taller now than it was at the end of May then. A quick Google says average L/H for Detroit is 40/50 in April. It's been significantly warmer than that with many days in the 60s and 70s.
Are you from Michigan or did you move here recently? Or perhaps you live further North?
