Swan Lake, SD has a generally warm climate with plenty of sun throughout the year. Summers are hot and humid with temperatures reaching up to 90 degrees Fahrenheit during the day and often dropping into the lower 70s at night. Winters are cold but not extremely frigid, usually ranging between 10-30 degrees Fahrenheit during the day and dipping below zero at night. Precipitation is spread fairly evenly throughout the year with occasional snowfall in winter months and sporadic rain showers in summer. Overall, Swan Lake enjoys a mild climate perfect for outdoor activities all year long.
Swan Lake, South Dakota gets 26 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Swan Lake averages 33 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 208 sunny days per year in Swan Lake. The US average is 205 sunny days.
Swan Lake gets some kind of precipitation, on average, 83 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 85 degrees
Winter Low: the January low is 8
Rain: averages 26 inches of rain a year
Snow: averages 33 inches of snow a year