RIVERTON, Wyo. – A deep chill settles over the Wind River Basin this morning, the kind of cold that bites before sunrise and paints frost across car hoods. The crisp calm of early fall in central Wyoming won’t last much longer — temperatures remain near freezing through midweek before clouds build toward a possible rain-and-snow mix this weekend.
According to the National Weather Service in Riverton, skies will stay clear through Thursday, bringing bright afternoons and chilly starts. Lows in the upper 20s to low 30s each morning will keep frost widespread from Fremont to Hot Springs County. Residents should continue protecting outdoor faucets, garden hoses, and tender vegetation as subfreezing conditions persist.
Daytime warmth offers relief, with highs near 60°F today and 61–64°F through Friday under light winds. But models show a colder, wetter system approaching from the west by late Saturday. Light rain could begin after midnight, with the potential for a rain-and-snow mix across elevations above 5,500 feet by early Sunday. Travel along Highway 789 and I-80 could become slick in spots if the colder scenario develops.
For now, central Wyoming enjoys a stretch of near-perfect fall afternoons — ideal for outdoor work, livestock prep, or Halloween decorating — but the weekend pattern marks the region’s first credible step toward winter. Residents are advised to secure outdoor equipment, check heating systems, and plan for changing conditions late Saturday through Sunday night.
Five-Day Forecast for Riverton, WY:
Tue: 60/29 – Sunny; cool start, calm winds.
Wed: 61/32 – Sunny; mild afternoon, chilly dawn.
Thu: 62/30 – Mostly sunny; steady fall warmth.
Fri: 64/34 – Partly cloudy; pleasant and calm.
Sat: 67/36 – Increasing clouds; rain-snow mix possible late.
