Casper, Wyoming gets 13 inches of rain, on average, per year. The US average is 38 inches of rain per year. Casper averages 70 inches of snow per year. The US average is 28 inches of snow per year.Click to see full answer. Keeping this in view, how cold does it get in Casper Wyoming?Average Weather in Casper Wyoming, United States. In Casper, the summers are warm and mostly clear; the winters are freezing, windy, and partly cloudy; and it is dry year round. Over the course of the year, the temperature typically varies from 17°F to 88°F and is rarely below -2°F or above 96°F.Furthermore, how often does it snow in Wyoming? The US average is 28 inches of snow per year. Climate Averages. Cheyenne, Wyoming United States Snowfall 58.3 in. 27.8 in. Precipitation 91.9 days 106.2 days Sunny 236 days 205 days Avg. July High 84.2° 85.8° Similarly, you may ask, does Wyoming have snow? Wyoming is one place to come if you love snow, though sometimes so much falls it can paralyze things. “Snowfall measured up to 30 inches with drifts 20 -30 feet high.”What is the coldest month in Wyoming?Cheyenne’s coldest month is January when the average temperature overnight is 14.8°F. In July, the warmest month, the average day time temperature rises to 81.9°F.