In addition to the snow, Denver tied the record low temperature for May 21 when the official thermometer for the city dropped to 31 degrees Tuesday morning. It was previously 31 degrees on this date in 2001 when 1 inch of snow fell.
In terms of high temperatures on Tuesday, they will struggle to reach into the lower 40s again making it the second day in a row with temperatures staying 30 to 35 degrees below normal for the third week in May. The record "coldest maximum" for May 21 is 40 degrees set 128 years ago in 1891. It's possible that record could also be challenged.
The chance for additional snow and eventually rain will continue into Tuesday afternoon before drier weather arrives Tuesday night. That being said, there is a chance for showers and thunderstorms during the afternoon on Wednesday with slightly warmer temperatures in the lower 50s.