Arizona — Pine trees stand still under a crystal-clear sky as Flagstaff wakes to 28 degrees early this Monday morning. Breath hangs in the air, and frost coats vehicles parked above 7,000 feet, signaling a true high-country winter start.
Sunshine dominates today, but don’t let it fool you. Despite clear skies, temperatures only climb into the low 40s this afternoon. Northwest winds gust near 20 mph, making it feel colder along I-40 and U.S. 180 during the midday travel window.
Tonight turns sharply colder again. Lows dip into the upper teens, allowing refreeze on shaded roads and sidewalks. Black ice remains a concern after sunset, especially near forested corridors and higher elevations outside town.
Tuesday brings brief relief. Mostly sunny skies help highs rebound near 48 degrees, though nights stay cold. Conditions remain dry through Tuesday evening, offering the best window for smoother end-of-year travel across northern Arizona.
Weather momentum shifts Wednesday. Clouds increase by late morning, and rain showers may develop by afternoon. Temperatures rise into the mid-50s, but don’t expect stability to last. By evening, precipitation becomes more widespread as colder air begins filtering back in.
New Year’s Day 2026 stands out as the most impactful period. Snow showers are likely, with highs near 47 degrees and gusty southwest winds. While snowfall totals remain uncertain, even light accumulation can quickly slow travel on I-40, I-17, and mountain passes. Conditions may deteriorate quickly after midday as showers intensify.
Thursday night stays unsettled with lingering showers and temperatures hovering near freezing. This setup favors slushy roads early, followed by refreezing after dark.
The final week of 2025 ends with classic Flagstaff winter swings—sun, cold, then snow. Plan extra time for New Year’s travel, carry winter gear, and monitor road conditions closely. Heading out for the holiday? How slick are roads where you are tonight?
Five-Day Outlook for Flagstaff, Arizona
- Monday: Sunny, windy, high 43
- Monday Night: Partly cloudy, low 17
- Tuesday: Mostly sunny, high 48
- Wednesday: Slight chance of showers, high 54
- Thursday (New Year’s Day): Snow showers likely, high 47
