– It’s almost time to swap out the summer shorts for warm trousers as warmer-than-normal temperatures give way to notably cooler and wetter conditions in central and western Wyoming. According to the National Weather Service in Riverton, rain and higher elevation snow is possible by Saturday and Sunday, with some freezing low temperatures in the high country. On Friday, Casper will see a very warm high of 85 degrees with elevated fire conditions and afternoon wind gusts up to 34 mph. Saturday will likely see rainfall mainly afternoon in Casper, with wind gusts up to 23 mph and a high of 70 degrees. A high of 57 degrees is expected for Monday, and 62 degrees likely for Tuesday.