The opening of walleye season is a Minnesota High Holy Day which starts around the middle of May. Anyone who’s been around for a bunch of them knows there will be years when there will still be ice floating around on the lakes.
Of course, out in the northwoods, it can be 39 degrees the morning of the Fourth of July.
Wife and I plus another couple sailed out of Two Harbors on the morning of July 4 some years ago. It was 70 degrees at the ore dock. Barely 40 out on the Big Lake.
Some years back, the wife and I stayed at a hotel in Superior, Wisconsin in late May. When we left that morning to head back home in a southerly direction, it was below freezing. Later that day when we got back to our home about 250 miles south it was almost 80 degrees. Every time we travel in that area in May, we freeze. Lake Superior is like one gigantic refrigerator.