the midwestern united states mainly has which type of climate?

The Midwestern United States mainly has continental climate.

Explanation:

The Midwestern United States have continental climate, with warm and humid air from the south in the summer months, and polar air masses from the north in winter. According to the Koppen climate classification, the southern part of the Midwest falls into the humid continental climate with hot summers, while the north of the region is largely assigned to the humid continental climate with warm summers.

The area of the Midwest is largely characterized by the glacial advances of various ice ages. Especially in Michigan, Wisconsin and Minnesota many lakes were created and the terrain is mostly flat in Illinois and northern Indiana as well as in Ohio. To the south and west, where the glacial times were longer, the landscape becomes more hilly due to erosion into the valleys of the Ohio and Mississippi Rivers as well as the Shawnee Hills, the Ozark Mountains and the Badlands of South Dakota. Due to the glacier periods, the soils in this region are very fertile. Provided that the climate allows sufficient growth time, agriculture (grain, corn, livestock farming) is very intensively practiced in this region.