The mountains make for a different snow schedule for parts of Colorado.
We planned a spring break trip to Colorado Springs one year in our RV. Got there, set up in gorgeous springtime like weather. Mentioned his pleasant it was to a local who responded “yeah, March is normally our heaviest snowfall month”. The Royal Gorge train was not open for the season yet, either.
We assumed January would have been when it was hard winter....
The snow in Denver is often completely gone in a day or two.
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Your local was correct. While it can get chilly, winter in Colorado doesn’t usually get started until January. March is the heaviest snow month, and April the second. However, Colorado has very wild weather where “typical” doesn’t mean much. I have been in five foot snowstorms on Thanksgiving and Christmas. It has snowed as early as September, and as late as May.