My fruit trees bloomed later this year. It has been a cold spring in my corner of the Midwest, colder on average and we are dropping below freezing the next few nights :(
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?