Casper, Wyoming has a semi-arid climate with warm summers and cold winters. Average summer temperatures range from the mid 70s to the upper 80s, and average winter temperatures can drop as low as the single digits. Rainfall is light throughout the year, with an annual average of only 12 inches. Snowfall can be quite abundant in the winter months, averaging over 50 inches per year. Overall, Casper experiences a relatively dry climate over most of the year, but it does receive some moisture in the form of rain and snow during certain times of the year.
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.
Weather Highlights
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