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
Lake, Milwaukee County, Wisconsin into two townships: the Town of Milwaukee, encompassing everything north of the present Greenfield Avenue, and the Town of Lake, encompassing everything South of the present Greenfield Avenue; "and the polls of election shall be opened at the house of Elisha Higgins, in said town." On March 8, 1839, a new Town of Kinnikennick was created, encompassing the western part of Lake (later the Towns of Greenfield and Franklin); and on August 13, 1840, the south portion of the Town of Lake was split off to form the town of Oak Creek. As of the 1840 census, the population of