Flagstaff, Arizona, defies the typical image of a desert state, offering a mountain climate where winter weather is a significant feature. As a high-elevation city on the Colorado Plateau, Flagstaff receives a substantial amount of snow each year. This high volume of winter precipitation contrasts sharply with the warmer climates found elsewhere in Arizona.
Flagstaff’s Annual Snowfall Totals and Seasonal Timing
The average annual snowfall in Flagstaff is approximately 90.1 inches, based on 30-year climate data, but this figure often exceeds 100 inches in a heavy season. This puts the city among the snowiest locations in the country, ranking higher than many cities in the Northeast or Midwest. Flagstaff’s yearly accumulation is significantly greater than cities like Salt Lake City, Utah, which averages around 53.6 inches.
The snow season typically runs from late October through the end of April, with occasional measurable snowfall possible even into May. The most intense period for winter weather generally occurs between January and March. January and February each average over 19 inches of accumulation, while March can often be the snowiest single month, sometimes recording over 20 inches of snow.
The depth and duration of the snow cover contribute to the long winter season, often remaining on the ground for well over half of the winter months. While the first flakes can fall in late autumn, the sustained and deeper snowpack builds up during the mid-winter months, creating a consistent environment for cold weather and snow accumulation.
Geographic Influences and Practical Implications
The substantial snowfall totals are a result of Flagstaff’s unique geographic position and high altitude. The city sits at an elevation of nearly 7,000 feet. This altitude combines with its location at the base of the San Francisco Peaks, which capture moisture from Pacific winter storms. This process leads to orographic lifting that enhances precipitation and snowfall.
The presence of heavy snow has several practical consequences for both residents and travelers regarding transportation. The Arizona Department of Transportation (ADOT) maintains the major interstates, I-40 and I-17, using snowplows and specialized equipment to keep routes open. Despite these efforts, major winter storms can lead to intermittent closures of the interstates.
Travelers should be prepared for winter driving conditions; four-wheel drive or all-wheel drive vehicles are highly recommended. Snow chains may be required during active storms on the interstates and are often mandated for the ascent to higher-elevation areas like the Arizona Snowbowl ski resort.
The consistent deep snowpack supports a thriving local recreation economy. This economy is centered on winter sports like skiing and snowboarding, which benefit directly from the high annual snowfall.