 Much of the Midwest will experience cooler than normal temperatures through Monday with a brief warm-up next Tuesday and Wednesday. World Weather Incorporated says rains will impact much of the Midwest Thursday into Saturday before turning drier next week. Shower and thunderstorm activity will occur throughout most of the northern plains through Tuesday with temperatures mostly in the 60s and 70s. U.S. Custom Harvesters President David Meisner has wrapped up his winter wheat harvest in Oklahoma.