Flagstaff, Arizona, in December presents a striking contrast to the desert conditions often associated with the state. While much of Arizona enjoys mild winter weather, this city perched at nearly 7,000 feet on the Colorado Plateau transforms into a genuine winter destination. Here, the climate is characterized by crisp, cool air, frequent snowfall, and a landscape dusted with white, creating a scenic escape for those seeking a colder climate experience.
December Temperature Overview
During December, Flagstaff experiences its coldest period of the year, with average high temperatures typically ranging from 43°F to 50°F (6°C to 10°C). Overnight lows, however, can drop significantly, often falling into the teens and low twenties Fahrenheit (-11°C to -6°C). This substantial diurnal temperature swing means that visitors must prepare for both chilly mornings and evenings and relatively mild afternoons, layering clothing becomes essential for comfort.
Precipitation and Snowfall
December is one of the wetter months in Flagstaff, with an average precipitation of over 2 inches. The majority of this falls as snow, contributing to the city's average December snowfall of approximately 17 inches. Snow cover is common and often persists throughout the month, blanketing the nearby San Francisco Peaks and creating a picturesque winter scene that attracts skiers and snow enthusiasts from across the region.
Sunshine and Daylight
Winter days in Flagstaff are notably short, with the month offering only about 9 to 10 hours of daylight. This is due to its northern location and low solar angle during this season. Consequently, the city receives fewer sunshine hours compared to other parts of Arizona, with skies often being overcast or partly cloudy, which adds to the crisp, wintry atmosphere but also underscores the importance of planning outdoor activities for the afternoon hours.
Wind and Humidity Factors
While Flagstaff is not known for extreme wind, December can bring occasional gusts, particularly during passing storm systems. These winds can create wind chill conditions, making the already cold temperatures feel even colder on exposed skin. The humidity levels remain relatively low, typical of high-altitude desert environments, which prevents the cold from feeling as heavy as it might in more humid climates, though the dry air can also lead to quicker heat loss from the body.
Activities and Preparation
Despite the cold, December is a vibrant time in Flagstaff, centered around winter sports. The Arizona Snowbowl offers excellent skiing and snowboarding, while the surrounding trails are ideal for snowshoeing and winter hiking. For those preferring less active pursuits, the city’s festive holiday decorations, cozy lodges, and proximity to the Grand Canyon provide ample options for a memorable winter getaway, provided one is properly equipped.
What to Pack
Heavy winter coat rated for sub-freezing temperatures
Insulated gloves, a warm hat, and a scarf
Waterproof or insulated boots with good traction
Layered clothing including thermal underwear and fleece
Sunglasses and high-SPF sunscreen for sunny afternoons
Travel and Safety Considerations
Travel to Flagstaff in December requires attention to weather forecasts and road conditions. Snow and ice can make driving challenging, especially on higher elevation roads and mountain passes, necessitating winter tires or chains at times. It is wise to check conditions on routes like I-40 and State Route 89A before departing and to allow extra travel time. Visitors should also ensure their vehicle kits include essentials like blankets, water, and non-perishable snacks in case of delays.
