The Upper Midwest is a region in the northern portion of the U.S. Census Bureau's Midwestern United States. It is largely a sub-region of the Midwest. Although there are no uniformly agreed-upon boundaries, the region is most commonly used to refer to the states of Minnesota, Wisconsin, and Michigan's Upper Peninsula. By most definitions, it extends into North and South Dakota, Illinois, and Iowa.
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The National Weather Service defines its Upper Midwest as the states of Iowa, Michigan, Minnesota, North Dakota, South Dakota, and Wisconsin. The United States Geological Survey uses two different Upper Midwest regions:
The Association for Institutional Research in the Upper Midwest includes the states of Iowa, Minnesota, North Dakota, South Dakota, Wisconsin, and the upper peninsula of Michigan in the region.
The region has dramatic variations between summer and winter temperatures; summers are very hot and winters very cold. For example, Sioux Falls averages 25 days each year with temperatures above 90 °F (32 °C) and 45 days each year with temperatures below 5 °F (-15 °C).Mitchell, South Dakota has a record high of 116 °F (47 °C) and a record low of -39 °F (-39 °C).
The growing season is shorter, cooler, and drier than areas farther south and east. The region's western boundary is sometimes considered to be determined by where the climate becomes too dry to support growing non-irrigated crops other than small grains or hay grass.
The Inland North dialect, most prominently characterized by the Northern Cities Vowel Shift, is centered in the eastern part of the Upper Midwest, including Wisconsin, Michigan, and the northern parts of Illinois and Ohio; it extends beyond the Midwest into Upstate New York. North Central American English (also known as "Upper Midwestern"), a residual[clarification needed] accent of American English, is spoken in Minnesota, parts of Wisconsin and Iowa, the Upper Peninsula of Michigan, portions of Montana, and the Dakotas.
The Upper Midwest was the heartland of early 20th-century Progressive Party politics, and the region continues to be favorable to the Democratic Party of the United States and moderate Republicans, with Minnesota favoring each Democratic presidential candidate since 1976 and Wisconsin from 1988 to 2012. Minnesota narrowly supported native Walter Mondale in 1984 in an election where Ronald Reagan won every other state. Michigan, Illinois, and Wisconsin also often favor Democratic candidates. However, beginning with the 2010 midterm elections, Republicans experienced substantial gains in state legislative and executive offices in Iowa, Minnesota, Wisconsin, and Michigan. This trend has continued through 2016. Minnesota is the only Midwestern state with a Democratic governor, Mark Dayton.
Donald Trump's 2016 presidential campaign made significant in-roads in the Upper Midwest. Trump won the electoral votes of Iowa, Wisconsin, Michigan, North Dakota, and South Dakota, leaving Illinois and Minnesota the sole Blue States in the Upper Midwest in 2016.Hillary Clinton barely won Minnesota, finishing less than 2 percentage points ahead of Donald Trump.
The economy of the region was largely based upon the mining of iron and copper, as well as a very large timber industry. Mechanization has sharply reduced employment in those areas, and the economy is increasingly based on tourism. Popular interest in the environment and environmentalism, added to traditional interests in hunting and fishing, has attracted a large urban audience who live within driving range.