On average, Denver sees eight inches of snowfall in December.
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LeadvilleAn average of 68 days of snow and over 150 inches of snow makes Leadville a wintery wonderland to enjoy during its peak winter months, December and January. Its subarctic climate makes for cold winters and mild summers, so Leadville is perfect for skiers, and snowboarders.
December skiing in Colorado can also be quite hit or miss, especially in the first half of the month. But the nice part is that you won't have too much competition for the snow. Snowfall can vary significantly from year to year.
And on average, January is the coldest month in Colorado, though sometimes December is the coldest in places, such as Colorado Springs and Denver. Typically, January and February are the snowiest months, so opt for these if planning a ski vacation.