FLAGSTAFF, Ariz. – The mountain air bit sharply before dawn Saturday as frost sparkled on pine needles under a thin crescent moon. That chill tells the story for northern Arizona this weekend—crisp mornings, bright sun, and dry air hanging over the high country through early next week.
According to the National Weather Service in Flagstaff, clear skies and light southwest winds will carry the region through a steady string of mild days and cold nights. Highs will hover near the mid-60s to upper 60s, while lows dip into the mid-30s. Patchy frost remains likely each morning, especially across open valleys and forest clearings along I-40 from Williams to Winslow.
Winds will pick up slightly Sunday and Monday, gusting near 20 mph during the afternoon hours. While no rain or snow is expected, the dry pattern means fire weather concerns continue in lower elevations, even as high country residents brace for the first true frost cycle of late October. Travelers should plan for brisk early-morning temperatures and sharp sun glare along mountain roads.
By Tuesday and Wednesday, calm air and rising temperatures bring a touch of late-fall warmth—ideal for outdoor cleanup or early Halloween decorating before cooler air slides in late week. Trick-or-treating Friday looks comfortably chilly, with 50s under clear skies and light winds.
A chilly November sits just around the corner.
Five-Day Forecast for Flagstaff, AZ:
Sat: 66/36 – Sunny; light winds, crisp morning frost.
Sun: 64/35 – Breezy; bright skies, gusts near 20 mph.
Mon: 67/34 – Sunny; mild afternoon, cool night.
Tue: 63/33 – Clear; calm winds, light frost early.
Wed: 65/33 – Sunny; warming trend, calm air.
