A majority of climate models suggest that precipitation in the Midwest will increase in the winter, spring, and fall by the end of the century, but models generally project slight decreases in summer precipitation.

The means of several climate models indicate that winter and spring precipitation may increase from 10 to 30% across the Midwest by the end of the century, with larger projected increases further north in the region. Fall precipitation may increase only slightly. Summer precipitation is projected to decrease by less than 10% across the Midwest by the end of the century, according to an average of multiple climate models.