FLAGSTAFF, Ariz. – The air feels sharp and still atop the San Francisco Peaks, with a frosty shimmer on rooftops and parked cars as dawn spreads over the high country. Halloween morning in northern Arizona begins at a crisp 32°F, the kind of chill that carries that unmistakable early hint of winter.
According to the National Weather Service in Flagstaff, clear skies and cold starts will define the weekend. Morning lows will dip near freezing both Saturday and Sunday, while afternoons recover quickly under full sunshine. Friday’s high near 68°F will give way to mid-60s Saturday and a pleasant 71°F Sunday — ideal for late-season hiking, downtown festivals, and early trick-or-treating.
Drivers along I-40 and Route 89A should expect bright, dry conditions with excellent visibility all weekend. Winds remain light through Saturday before picking up slightly from the southwest on Sunday. Fire danger stays low but not zero — especially east of town where grass remains dry.
By early next week, a mild ridge strengthens across the region, nudging highs back into the upper 60s to low 70s. Nights will stay cold, with repeated frosts likely in low-lying valleys and shaded neighborhoods. Though no snow is expected yet, models hint at a pattern shift by mid-November that could bring the first measurable flakes to northern Arizona’s highest peaks.
Residents should enjoy this stretch of crisp, calm fall weather — perfect for pumpkin strolls, mountain drives, and preparing for the colder weeks ahead.
Five-Day Outlook for Flagstaff, AZ:
Fri: 68/30 – Sunny; calm and cool.
Sat: 68/31 – Mostly clear; frosty dawn.
Sun: 71/35 – Sunny; mild afternoon.
Mon: 67/32 – Bright skies; gradual warming.
Tue: 65/33 – Sunny; light southwest breeze.
