FLAGSTAFF, Ariz. – The high country wakes cold and clear this morning, air sharp against pine needles and rooftops glistening faintly under starlight. Fall’s quiet intensity is settling in across northern Arizona as dry air and chilly nights hold steady through midweek, signaling the first widespread frost risk of the season for the mountain valleys.
According to the National Weather Service in Flagstaff, today will stay mostly sunny but breezy, with gusts up to 25 mph along I-40 and U.S. 89. Afternoon highs reach the mid-60s before falling quickly toward the 30s after sunset. Winds will ease Monday as clear skies and calm air allow radiational cooling — ideal conditions for early-morning frost in low-lying neighborhoods.
Daytime warmth will rebound slightly Monday and Tuesday, with highs in the upper 60s but crisp mornings in the lower 30s. Residents should protect tender plants, outdoor pipes, and pet water dishes from freezing. Drivers heading east toward Winslow or south toward Sedona can expect dry pavement and excellent visibility, though early commutes may start with icy windshields.
The week ahead looks dry and stable, perfect for Halloween decorations or yard cleanup before November’s chill arrives. Trick-or-treat weather across Coconino County should stay mild Friday evening, with calm winds and temperatures in the upper 50s at sunset — sweater weather rather than coat weather.
Still, long-range models hint at a colder shift early next week, perhaps the first step toward true winter air in the high country.
Five-Day Forecast for Flagstaff, AZ:
Sun: 64/38 – Mostly sunny; breezy southwest winds.
Mon: 68/34 – Sunny, calm; cold early morning.
Tue: 63/32 – Bright, crisp; light northeast breeze.
Wed: 65/31 – Sunny and clear; classic fall day.
Thu: 67/34 – Calm, mild; dry ahead of Halloween.
