The Fourth of July is usually Milwaukee's best holiday for weather. Given the fact that July is our warmest month with close to 70 percent of possible sunshine, the odds of having a nice weather day are good. If you look at our other holidays, its easy to understand why. By Labor Day we are already starting to cool, although it is probably the second nicest weather holiday.
Thanksgiving can bring almost anything including snow.
Every Independence Day is not great in terms of weather. There have been many parades, picnics, and fireworks washed by summer thunderstorms. These easily form when tropical air and a front cover the state. Since most summer thunderstorms are of short duration, all day rains are very uncommon. Fog has also been a holiday problem in the past.