Average annual precipitation projections suggest small changes in the Southern Plains region, with slightly wetter winters, particularly in the north of the region, and drier summers.

By mid-century, summer precipitation is expected to decrease by 5-15% for much of Kansas, Oklahoma, and northern Texas, and increase by as much as 15% in central Texas. The means of several climate models indicate that winter and spring precipitation may increase by up to 10% percent by mid-century across most of the region, although southwest Texas may see decreases during these seasons. Under mild climate scenarios, changes are generally smaller than in more extreme climate scenarios.