Lebanon, SD has a humid continental climate. Summers are warm and humid, with temperatures reaching into the low-90s Fahrenheit (32-35°C). Winters are cold and snowy, with temperatures dipping to an average low of 10°F (-12°C) in January. Average annual precipitation is about 28 inches (710 mm), most of which falls from April to September. The city often receives snow in winter months, which melts away quickly due to the moderate temperatures.
Lebanon, South Dakota gets 20 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Lebanon averages 39 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 200 sunny days per year in Lebanon. The US average is 205 sunny days.
Lebanon gets some kind of precipitation, on average, 65 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 5
Rain: averages 20 inches of rain a year
Snow: averages 39 inches of snow a year