Places › Flagstaff, AZ › December

Flagstaff in December

A good month — score 69 of 100

Typical December days in Flagstaff reach about 43°F with nights near 17°F; about 18 inches of snow falls in a typical month.

What to pack for Flagstaff in December

• A real winter coat — typical nights drop below freezing, to about 17°F.
• Layers — afternoons run about 26° warmer than mornings.
• A compact rain layer — about 7 days see rain in a typical December.
• Insulated boots and a winter kit — a typical December brings about 18 inches of snow.
• Ski kit or rental reservations — this is prime season.

Every packing line is triggered by a number on this page — the rules are on How we pick.

December vs. the alternatives

The whole year in Flagstaff

Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.