Dearborn, SD has a continental climate, with hot summers and cold winters. Temperatures can range from -30°F in the winter to over 100°F in the summer. In general, summers are warm and fairly humid while winters are usually cold and dry. Average annual snowfall is around 25 inches, while precipitation ranges from 20-30 inches annually. Despite its location in the Northern Great Plains, Dearborn experiences four distinct seasons each year. The fall season brings cool temperatures and colorful foliage while spring is often windy with pleasant temperatures during the day and cooler evenings.
Dearborn, South Dakota gets 23 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Dearborn averages 37 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 211 sunny days per year in Dearborn. The US average is 205 sunny days.
Dearborn gets some kind of precipitation, on average, 76 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 86 degrees
Winter Low: the January low is 6
Rain: averages 23 inches of rain a year
Snow: averages 37 inches of snow a year