Multiple Wyoming communities posted unusually high temperatures Sunday as a prolonged heat event continued into the new week, according to local observations and National Weather Service advisories. The spike included readings in the triple digits and several record or near-record values that strained local infrastructure and raised public-safety concerns.
Where it was hottest
The highest verified reading in the state over the weekend was in Worland, which reached 110°F. Other notable highs included Cowley 109°F; Hot Springs County and Powell 106°F; Buffalo 105°F; and Riverton 104°F. The city of Casper reported a high of 101°F at the official observing station, although some locally mounted thermometers registered higher values.
| Location | Reported High |
|---|---|
| Worland | 110°F |
| Cowley | 109°F |
| Powell / Hot Springs County | 106°F |
| Buffalo | 105°F |
| Riverton | 104°F |
| Casper (official) | 101°F |
Advisories and historical context
The National Weather Service in Cheyenne extended a heat advisory beginning at noon Saturday and continuing through midnight Tuesday for areas along, north and east of Interstate 25. Officials warned of sustained high daytime temperatures and warm overnight lows in many valleys and urban areas.
"Stay hydrated, eat snacks, and take regular breaks while being outdoors." — NWS Forecast Office Cheyenne
Wyoming has seen major heat waves before. The highest temperature on record for the state is 115°F, recorded at Basin on Aug. 8, 1983. Other historical readings above 115°F include reports tied to earlier heat events recorded in the historical record.
Local impacts and safety steps
Sustained extreme heat presents multiple risks for Wyoming communities: increased demand on electrical grids, stress on livestock and crops, elevated wildland fire danger, and greater risk of heat-related illnesses for outdoor workers and vulnerable residents. The warm overnight lows — in many places staying in the mid-60s — reduce overnight relief and can exacerbate health risks.
- Pay attention to local heat advisories and cooling center announcements.
- Limit outdoor exertion during peak heat hours and take frequent water breaks.
- Check on elderly neighbors, young children and livestock.
Forecast agencies expect the heat to ease later this week in many areas, with temperatures dropping back toward more typical summer levels by midweek. Until then, state and local officials continue to emphasize precautions to protect public health and property.
— Reporting from Worland and state forecast summaries
