Spring is Mini-Flu Season; Dress for the Weather As a mom of four, I know all about kids and spring fever. At the first melting of snow off from Lake Michigan, they want to get the bathing suits out. In their warm weather zeal, they forget that they can still catch a chill. Just because the weather is getting nicer, doesn't mean you won't get sick if you don't dress properly. Winter is the official flu season, but spring can be a mini flu season."