Heat in Yellowstone National Park, Wyoming

Record heat occurred at the Lake Yellowstone ASOS. Five consecutive days had high temperatures of 80 F or greater. On September 7th, a record high temperature of 83 degrees F broke the all time record high for September.

A persistent and amplified ridge brought a prolonged period of unusually hot temperatures to western and central Wyoming for the beginning of September 2022. Most lower elevation sites saw high temperatures topping 90 F for several days, including a few locations reaching 100 F. All time September high temperatures were set at several sites including: Riverton, Lander, Casper, Worland, Buffalo, Greybull, Big Piney and Lake Yellowstone. Temperatures cooled on September 8th and 9th when a strong cold front moved southward across the state.