A thin veil of frost clings to rooftops in Flagstaff this morning as the thermometer sits near 21°F. The mountain air is calm and crystal clear — a sharp start that quickly gives way to sunshine. By midday, the high country warms fast, with temperatures rising into the low 50s and skies glowing bright blue.
According to the National Weather Service in Flagstaff, a stable ridge of high pressure will keep northern Arizona sunny and dry through at least Friday. Afternoon highs climb gradually, peaking near 60–63°F midweek, while lows dip into the low 20s to low 30s each night. With calm winds and no precipitation in sight, travel along I-40, US 180, and Route 66 should remain smooth — though drivers should still watch for icy patches at dawn where frost lingers in shaded areas.
These sharp day-to-night swings — nearly 40 degrees in a single day — are typical for the high plateau this time of year. It’s perfect weather for holiday shopping, winter hiking, or early ski prep, though mornings will require heavy layers before shedding them by afternoon.
Looking ahead, long-range models show the potential for a pattern shift next week as colder air dips south from the Rockies. Meteorologists are watching whether this could trigger light snow chances around Dec. 14–16 — a possible “winter tune-up” before the holidays.
Five-Day Outlook (Flagstaff, AZ):
- Tuesday: Sunny, high 58°F, low 31°F.
- Wednesday: Sunny, high 60°F, low 33°F.
- Thursday: Sunny, high 63°F, low 33°F.
- Friday: Sunny, high 62°F, low 32°F.
- Saturday: Sunny, high 60°F.
