But it's cloudy. A lot. It literally does not raise to my conscious awareness if the sun does not shine in December. And I mean literally in its original sense. It takes over 30 days in the winter for me to notice that I haven't seen the sun in a while and another couple of weeks before I'm really bothered by it. We're already far enough north that winter days are noticeably shorter and less bright as it is, and then the sun doesn't even shine. In the summer 50% cloudy is a fairly normal day. Bright blue sky from horizon to horizon is uncommon enough to be worth noting.
Solar advocates may relax as I'm not going to claim that solar is "useless" in Michigan. However, it is undeniably a lot more useful in deserts that are much closer to the equator. And big government solar projects really do pencil out much worse in Michigan than they do in California or Arizona, even though I'm not constantly dodging death around here. I like the diversity in power sources on general principles but we do take an efficiency hit to get it.