Riverton, Wyo. – A quiet but sharp fall chill is tightening its grip across central Wyoming this Monday morning. Clear skies and dry air have allowed temperatures to tumble into the mid-30s before sunrise, and the next two nights could bring the first widespread frost of the season to the Wind River Basin.
According to the National Weather Service in Riverton, Monday will stay breezy and cool, with west winds gusting up to 25 mph under sunny skies. By Tuesday morning, calmer air will settle in, and low temperatures are expected to dip near freezing — possibly colder in rural valleys and along the lower foothills. Those cooler pockets could see frost form on rooftops, pastures, and windshields by sunrise Wednesday. Residents are urged to protect garden vegetation and check outdoor plumbing and water troughs before the coldest stretch hits.
Daytime highs remain mild in the upper 50s to lower 60s through midweek, offering crisp but comfortable afternoons. The air will stay very dry, with no measurable precipitation expected until the weekend, when models hint at a weak disturbance that could bring isolated mountain showers or a sprinkle across Fremont County.
For now, the region’s fall rhythm continues — bright sun by day, biting chill by night. The clear, calm pattern looks to hold through Friday, but the longer-range models suggest another cold push by Sunday, possibly nudging Riverton toward its first official fall freeze as Halloween week approaches.
Five-Day Forecast for Riverton, WY:
Mon: 55/25 – Sunny and breezy; gusts to 29 mph.
Tue: 59/29 – Calm and cool; patchy frost at dawn.
Wed: 61/32 – Sunny and crisp; frost possible early.
Thu: 62/30 – Mostly sunny; light winds.
Fri: 64/35 – Clear and pleasant; chilly morning.
