Heat in Wyoming, March 17 to 30, 2026

It was a record warm period for much of the latter half of March. The period averaged nearly 15 degrees above normal, with every day but one at least 10 degrees above normal for the daily average temperature. Ten of these days set daily record high temperatures. The previous all time monthly high temperature of 69 was tied or broken six times. This includes four high temperatures in the 70s, which are the first four occurrences on 70 degree temperatures in station history, including the new monthly record high of 73. Records at the Big Piney airport date back to 1998.

The latter half of March featured record warmth for Buffalo. At the Johnson County airport for the period March 17 to 30 every day but one had above normal daily average temperatures, with 10 of those days 10 or more degrees above normal. Five new daily record high temperatures were set. The old monthly record high of 79 degrees was tied or broken four times. There were two high temperatures over 80, which were the earliest occurrences of 80 degrees in station history and the first recorded 80 degree March high temperature in station history. Records at the Buffalo airport date back to 1998.

The latter part of March was a record warm one for Natrona County. The two week period from March 17 to March 30 averaged almost 17 degrees above normal daily average temperatures; with all but two days at least 10 degrees above normal. Nine new daily record high temperatures were set. The old monthly second high temperature of 77 degrees was tied or broken six times, including four days in a row from March 18 to March 21. There were four high temperatures in the 80s, which were the first four occurrences of 80 degrees in March in station history. Records in Casper date back to 1940.

Record warmth occurred over the latter half of March in Big Horn County. The period from March 17 through March 30 averaged more than 12 degrees above normal. Every day but one had above normal daily average temperatures, with ten days more than 10 degrees above normal. Seven new daily record high temperatures were set. The previous monthly record high temperature of 81 was tied or broken on three consecutive days from March 19 to March 21, including a new monthly record high temperature of 85 on March 21. The previous earliest occurrence of 80 degrees was broken by 12 days. Records at the South Big Horn County airport near Greybull date back to 1998.

Most of the second half of March featured record breaking warmth in Yellowstone Park, including at Lake Yellowstone. Daily average temperatures for the period March 17 to March 30 averaged more than 15 degrees above normal. Eight near daily record high temperatures were set. The all time monthly high temperature of 57 degrees was broken on four consecutive days from March 18 to March 21. And, there was the first occurrence of 60 degrees in March in station history on March 19, more than a month earlier than previous earliest occurrence on April 22, 2016. Records at Lake Yellowstone date back to 1998.

The Lander airport experienced record warmth for most of the second half of March. Daily average temperatures from March 17 though March 30 were more than 17 degrees above seasonal normals, with every day above normal. Nine days were more thn 15 degrees above normal. Nine daily record high temperatures were set, including five days in a row from March 17 to March 21. The old monthly high temperature of 76 degrees was broken four times, including three days in a row from March 19 to 21. There were three days of highs in the 80s, the first three in station history. The high of 80 degrees on March 19 was the earliest 80 degree temperature by 22 days. Records at Lander date back to 1892.

It was a record breaking second half of the month of March at the Riverton airport. For the period from March 17 to March 30, the average daily temperatures were more than 17 degrees above normal. For the period March 17 to 21, average temperatures were more than 25 degrees above normal. Eight daily record high temperatures were broken. The previous all time monthly high of 76 degrees was broken 5 times, including four consecutive days from March 18 to 21. There were 3 high temperatures in the 80s, the first three 80 degree high temperatures in March in station history. The high of 80 degrees on March 19 was more than a month earlier than the previous earliest 80 degree of April 22 in 2012. Records at the Riverton airport date back to 1997.

It was a record breaking second half of the month around Rock Springs. At the Sweetwater County airport, average daily temperatures from March 17 through March 30 averaged more than 17 degrees above normal. All but one of those days were more than 11 degrees above normal. Nine new daily record high temperatures were set, including four consecutive days from March 18 to March 21. The previous all time monthly high temperature was tied or broken seven times, with the new all time monthly high of 78 set on March 25. The high of 72 on March 18 was the earliest occurrence of 70 degrees in station history. Records at the Sweetwater County date back to 1948.

Much of the second half of March had record breaking warmth in Washakie County, including at the Worland airport. Average daily temperatures were 13 degrees above normal for the period from March 17 to March 30. During this period, six new daily record high temperatures were set, including on 5 consecutive days from March 17 to March 31. The previous monthly record high temperature of 81 degrees was broken four times, including three consecutive days from March 19 to 21. The high of 80 degrees on March 19 was the earliest occurrence of 80 degrees, breaking the old record of March 28. And finally, the high temperature of 88 degrees on March 21 tied the record high temperature for April.