Weather, Temperatures & Seasons in South Dakota

South Dakota has four distinct seasons, each more stunning than the last. Divided by the Missouri River, each side of the state features slight differences in climate: the east sees moderate humidity and precipitation, while the west tends to be drier with less rainfall. And no matter the season, be prepared for a little wind!

To find the best time to visit, explore weather in South Dakota by season, average temperatures by month and local resources to help ensure a pleasant visit.

South Dakota Seasons

Spring Weather in South Dakota

Pasque flowers herald the arrival of spring, a time of colorful — and, when it comes to baby animals, adorable — rebirth with mild weather and some rain. Spring temperatures average between 50°F (10°C) and 60°F (16°C) during the day and anywhere from 45°F (7°C) to below freezing at night, depending on the month. Much of South Dakota’s precipitation comes in late spring, varying from short showers to larger thunderstorms. In western South Dakota, spring snow showers are a possibility — the ski town of Lead averages 66 inches of snow in March and April — but the average South Dakotan has their winter clothing put away by late spring.

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Summer Weather in South Dakota

The sun is shining and seasonal businesses are open in the summer, making late May to early September the most popular time to visit South Dakota. There are usually 15-16 hours of daylight per day, although thunderstorms do occur. Temperatures can vary depending on what part of the state you're in, but you'll generally find semi-humid summers with an average high of 90°F (32°C) during the day and lows near 60°F (16°C) at night. We recommend you pack light, breathable clothing during July and August.

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Fall Weather in South Dakota

The variety of trees in South Dakota become color-changing canvases in the autumn. Leaf peepers make foliage pilgrimages to places like Spearfish Canyon and Sica Hollow State Park to take in the gorgeous transition. Fall weather tends to be mild, with an average daytime high of 57°F (14°C) and low of 44°F (7°C), although temperatures and precipitation can vary. Fall days are usually sunny and mild, and the evenings cool. The first freeze generally happens in early October, but it's not uncommon to need nothing more than a light jacket the next day. However, snow can be a possibility, so it's best to pack layers that will allow you to fully enjoy the crisp autumn air and beautiful fall views.

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Winter Weather in South Dakota

The last months of the year alternate between dry and snowy. The latter is welcomed by winter sports enthusiasts. December through early March is ideal for taking advantage of South Dakota's ski areas and 1,500+ miles of snowmobile trails, as well as ice fishing, road-tripping, hockey and ice skating, and other winter activities. South Dakota winter temperatures range from mild to extreme, producing average January highs below 32°F (0°C) and average lows below 10°F (-12°C). Whether you're celebrating winter in the Black Hills & Badlands or in the southeastern corner of South Dakota, be sure to pack warm clothing when visiting between December and February.

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South Dakota Average Temperatures & Precipitation by Month

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