Letcher, South Dakota has a humid continental climate with hot summers and cold winters. The average annual temperature is about 48°F (9°C) with the average high in July reaching 84°F (29°C) and the average low in January around 3°F (-16°C). Precipitation averages about 22 inches (559mm) per year, falling mainly in the form of snow during the winter months.
Letcher (zip 57359), South Dakota gets 23 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Letcher (zip 57359) averages 35 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 Letcher (zip 57359). The US average is 205 sunny days.
Letcher (zip 57359) gets some kind of precipitation, on average, 78 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 87 degrees
Winter Low: the January low is 8
Rain: averages 23 inches of rain a year
Snow: averages 35 inches of snow a year