Flagstaff, AZ – The mountain air feels sharp and still this morning as temperatures linger near 27°F before sunrise. Frost coats rooftops, windshields glint under starlight, and the city stirs slowly under a clear, icy sky. Yet by afternoon, Flagstaff’s sun will erase the chill, pushing highs toward a pleasant 63°F — the kind of December calm locals appreciate between winter storms.
According to the National Weather Service in Flagstaff, this steady pattern holds through Saturday, bringing sunny skies, calm winds, and mild daytime warmth. Lows each night will still dip to around 28°F to 31°F, so watch for patchy frost and slick morning spots, especially in shaded or elevated areas.
Sunday brings a slight cooldown with highs near 58°F, still well above freezing and perfect for travel on I-40 and US-89. Long-range models show a shift by midweek as colder air begins nudging south — a possible “winter tease” ahead of the holiday rush. For now, though, northern Arizona remains dry, stable, and crystal clear.
Five-Day Outlook (Flagstaff, AZ)
- Friday: Sunny, high 62°F, low 29°F.
- Saturday: Sunny, high 62°F, low 31°F.
- Sunday: Partly sunny, high 58°F, low 30°F.
- Monday: Sunny, high 58°F, low 30°F.
- Tuesday: Sunny, high 54°F, low 32°F.
