I think if I were to recommend to anyone the month to visit Wisconsin it would be September. The high heat is over. The humidity goes down. The days are sunny and bright. There is warmness in the air yet a touch of crispness. The evenings are cool and refreshing. It's beautiful here in September. Lately it has been quite foggy and moist in the very early mornings only to burn off by mid morning yielding a fabulous day.