Climate of Milwaukee Climate of Milwaukee Milwaukee has a humid continental climate (Köppen climate classification "Dfa"), with four distinct seasons and wide variations in temperature and precipitation in short periods of time. The city's climate is also strongly influenced by nearby Lake Michigan, which creates two varying climates within the Milwaukee area. The Urban heat island effect also plays a role in the city's climate, insulating it from winter cold, but keeping it cooler in spring and summer. Milwaukee has a continental climate with wide variations in temperatures over short periods, especially in spring and autumn. The warmest month is July, when the
Milwaukee Avenue (Chicago) Tollway split off, continuing to Milwaukee. From Harlem Avenue northwards it is Illinois Route 21. Milwaukee Avenue is a popular route for bicyclists. The southeastern end of Milwaukee Avenue is the most heavily bicycled stretch of road in Chicago, with cyclists accounting for 22% of all traffic there on a randomly selected day in September. The street is lined with storefronts, restaurants and the occasional art gallery through most of the city. The CTA's Blue Line runs beneath or alongside Milwaukee Avenue from its beginning at Canal and Lake Streets out to Logan Boulevard, with stations at Grand Avenue, Chicago