57730 Custer, SD has a semi-arid climate with warm summers and cold winters. The average temperature in the summer is around 75 degrees Fahrenheit and in the winter it can drop to around 10 degrees Fahrenheit. Precipitation is sparse with only 18 inches on average per year, usually occurring as thunderstorms during the summer and snow during the winter months. The area can experience extreme temperatures from time to time, so it’s important to be prepared for inclement weather when visiting or living in 57730 Custer, SD.
Custer (zip 57730), South Dakota gets 20 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Custer (zip 57730) averages 55 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 226 sunny days per year in Custer (zip 57730). The US average is 205 sunny days.
Custer (zip 57730) gets some kind of precipitation, on average, 93 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 80 degrees
Winter Low: the January low is 16
Rain: averages 20 inches of rain a year
Snow: averages 55 inches of snow a year