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.

Heat in WIND RIVER BASIN, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS weather station at the Riverton Airport (Central Wyoming Airport) observed record high temperatures on 6 consecutive days. Highs were 90 or greater on the first 8 days of the month. The high temperature of 100 F on September 4th is the all time high for September, as well as the latest date to reach 100 F on record.

Heat in LANDER FOOTHILLS, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Lander Airport (Hunt Field Airport) recorded 6 consecutive days of record high temperatures over 90 degrees F. The high temperature of 99 F on September 4th is the all time record high for the month of September. Records at Lander date back to 1891.

Heat in EAST SWEETWATER COUNTY, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Rock Springs Airport (Southwest Wyoming Regional Airport) had 6 consecutive days of record high temperatures in the 90s. The high temperatures of 93 F on the 4th and 7th are now tied for the all time high temperature for the month of September.

Heat in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Casper Airport (Casper���Natrona County International Airport) had 7 consecutive days of high temperatures 90 F or greater. In addition, the high temperature of 100 F on September 4th is the all time high temperature for the month of September, and the first ever recorded 100 degree temperature in the month. Records at the site date back to 1947.

Heat in NORTHEAST JOHNSON COUNTY, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Record and near record temperatures were observed at the Johnson County Airport (near Buffalo, WY)  for the first 7 days of the month. The heat peaked on September 4th with a high temperature of 100 F. This is the all time high temperature for September, and the first ever recorded 100 degree F temperature for the month of September.

Heat in SOUTHEAST BIG HORN BASIN, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The month started with 7 consecutive days of high temperatures over 90 degrees at the Worland Municipal Airport. Most notable was the high of 102 F on September 4th, which broke the all time September high temperature.

Heat in NORTH BIG HORN BASIN, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

At the Greybull Airport (South Big Horn County Airport) there were 7 consecutive days of high temperatures over 90 degrees to start the month. On the 4th and 7th, the all time September high temperature of 103 degrees F was set then tied. The 103 F on September 7th is now the latest 100 F or greater temperature for the site.

Heat in YELLOWSTONE NATIONAL PARK, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

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.

Heat in UPPER GREEN RIVER BASIN, WYOMING
From 01-SEP-22 00:00:00 to 08-SEP-22 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Record and near record temperatures occurred at the Big Piney-Marbleton Airport. On September 4th, 6th, and 7th, record high temperatures of 91 F set and then tied (twice) the all time high temperature for the month of September. September 7th is also the latest 90 degree F or greater temperature for this site.