Rain and snow today in Denver More snow showing up this evening as temperatures drop Rain and snow tonight in metro Denver and last updated 2021-03-04 13:27:59-05 DENVER â Say "So long!" to the 60s for a couple of days as a storm rolls into Colorado. We're already seeing some snow on the western slope and a rain-snow mix will develop across the Denver metro area this afternoon. Snowfall should be pretty decent in the high country with 6 to 12 inches for the San Juan Mountains and 4 to 8 inches elsewhere. Denver and the eastern plains could get 1/4 to 1/2 inch of moisture, starting as rain during the day on Thursday, but mixing with and changing to snow in the late afternoon and continuing through the evening. How much of the storm will fall in frozen form will be the tricky part!