Weather in December
is the beginning of the cold winter season in New Mexico
with little precipitation amid regular sunshine. Extreme variations are common in temperatures between day and night. High deserts in the Colorado Plateau in the northwest corner experience a drop of 25°F (-3.9°C) to 30°F (-1.1°C) during the night. The average high temperatures are in the mild 39°F (3.9°C) to 46°F (7.8°C) range in the north and warm 43°F (6.1°C) to 57°F (13.9°C) in the south. The average low temperatures remain in the 11°F (-11.7°C) to 31°F (-0.6°C) zone in the south, while the north is cold in the 5°F (-15°C) to 21°F (-6.1°C) range.
Southern New Mexico rarely receives heavy snowfall, while the rest of the state registers between 4" (102mm) to 6" (152mm), barring the high mountains where it is between 15" (381mm) to 20" (508mm).
The conditions are mostly dry with the sunshine in a pleasant mode. Arctic chill rarely makes it to the south of New Mexico. Frozen waterfalls and Christmas train rides over the white, snowy landscape remain in memory for a long time.