RIVERTON, Wyo. – The pre-dawn air bites this morning across the Wind River Basin, each breath visible under a crystal-clear sky. Frost coats rooftops and fields near Riverton Regional Airport, where readings dipped into the low 20s—one of the coldest mornings so far this fall. The stillness is striking, but change is on the way.
According to the National Weather Service in Riverton, a dry ridge of high pressure will dominate through the end of the week, bringing sunshine, light winds, and gradually moderating temperatures. Highs rise into the 50s today, climbing toward the low 60s by Saturday. That steady warm-up means pleasant afternoons for last-minute Halloween decorations and outdoor school events across Fremont County.
Residents should still protect outdoor plants and pipes through early hours today, as subfreezing pockets linger north toward Shoshoni and Pavillion. Winds stay light, and roads along Highway 789 and U.S. 26 will remain dry and clear heading into Halloween. Friday’s weather looks ideal—mostly sunny skies, highs near 51°, and calm air through the evening. Trick-or-treaters can expect temperatures near 40° by dusk, dropping into the 30s later with clear skies and light breezes.
This mild stretch continues through the weekend, with highs reaching the upper 60s Sunday before a cooler pattern begins to take shape early next week. To be fair, it’s a calm and classic late-fall setup—bright days, cold mornings, and that quiet sense of winter waiting in the wings.
After all, clocks fall back at 2 a.m. Sunday, ushering in earlier sunsets and a crisp November feel across central Wyoming.
Five-Day Forecast for Riverton, WY:
Wed: 54/27 – Increasing clouds; calm, cool afternoon.
Thu: 52/26 – Sunny; cold start, light wind.
Fri: 51/26 – Mostly sunny; cool trick-or-treat evening near 40°.
Sat: 62/37 – Mostly sunny; warming trend begins.
Sun: 67/30 – Sunny and mild; cooler pattern returns early next week.
