Casper has a semi-arid climate with cold winters and hot summers. The area experiences low humidity levels throughout most of the year and receives a moderate amount of precipitation mostly during the summer months.
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.
On average, there are 220 sunny days per year in Casper. The US average is 205 sunny days.
Casper gets some kind of precipitation, on average, 79 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 88 degrees
Winter Low: the January low is 15
Rain: averages 13 inches of rain a year
Snow: averages 70 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Casper is 6.8 (10=best), which means it is more comfortable than most places in Wyoming.
8.8 / 4.9
Summer / Winter
June, August and September are the most pleasant months in Casper, while December and February are the least comfortable months.