Arizona – Frost coats rooftops and parked cars across the high country as Flagstaff starts MLK Day under clear skies and freezing temperatures. The air feels sharp at sunrise, and quiet roads hint at slick patches where moisture lingered overnight.
According to the National Weather Service in Flagstaff, morning temperatures sit in the low 20s with calm winds, allowing cold air to settle into valleys. Sunshine dominates today, helping temperatures rebound into the low 50s by afternoon. Despite the warmup, shaded sidewalks and elevated roadways may stay icy early, especially near I-40 and Route 180.
Conditions remain quiet tonight with clear skies and lows near 21 degrees. Tuesday continues the warming trend. Dry air and sunshine push highs into the low 50s again, making it feel more like early spring than mid-January. Snowpack around town begins to soften during the day, then firms back up after sunset as temperatures drop below freezing.
By Wednesday, warmth peaks. Highs reach the mid-50s under sunny skies, a notable swing from the morning freeze earlier in the week. Melting snow during the afternoon could refreeze at night, creating isolated slick spots in parking lots and neighborhood streets.
Attention then shifts late week. Increasing clouds Thursday signal a pattern change, and by Friday, light snow showers become possible. Any snowfall appears minor for now, but even light flakes can impact travel at elevation. Gusty afternoon winds may also reduce visibility on open stretches of I-40 east of Flagstaff.
Looking farther out, 6–10 day outlooks suggest near-normal precipitation with continued temperature swings across northern Arizona as winter patterns stay active.
Heading out today? Dress in layers, watch for icy patches early, and prepare for quick changes later this week. How much frost did you scrape off your windshield this morning?
Five-Day Weather Outlook for Flagstaff, AZ
• Today (MLK Day): Mostly sunny, high near 52°F.
• Tuesday: Sunny, high near 51°F.
• Wednesday: Sunny and mild, high near 56°F.
• Thursday: Partly sunny, high near 52°F.
• Friday: Chance of snow showers, high near 48°F.
