By the middle of the century, the Great Plains region is expected to experience between 10 and 30 more days per year with a maximum temperature exceeding the current hottest 2% of days.

For an average of seven days per year, maximum temperatures reach more than 100 degrees F in the Southern Plains and about 95 degrees F in the Northern Plains. By the middle of the century, Central Texas north to the Dakotas may experience an increase of 10-20 more hot days per year. East Texas, Wyoming, and western Montana are projected to have 22-30 more hot days by the middle of the century, according to a range of climate scenarios. Similar increases are expected in the number of nights with minimum temperatures higher than 80 degrees F in the south and 60 degrees F in the north.