Locations where April is the snowiest month, or tied for the snowiest month of the year, on average. (Dr. Brian Brettschneider/WRCC) At a Glance Not December, January or February. These locations can have their heaviest snow in April.They tend to be located in the Rockies and adjacent High Plains.There have been several powerful April, even May snowstorms in recent years. You may not think "April" and "heavy snow" go together in the same sentence, but in parts of the U.S.,...