Badlands Weather: Forecasts, Climate, and the Best Time to Visit

By Victoria Boissonade · Data: National Park Service · ← Complete guide Badlands

Badlands National Park has a semi-arid continental climate with dizzying extremes. The thermometer has come close to 117 °F in summer and reached -40 °F in winter. In between, conditions can change constantly, with thunderstorms that appear in as little as 20 minutes. In short, you can visit the park year-round, but it offers a very different experience depending on when you go.

Badlands National Park Climate, Month by Month

Approximate climate normals based on historical averages.

The park receives about 15 inches of precipitation each year, mostly from May through August. That may not sound like much, but the rain arrives in bursts of thunderstorms, turning the clay soil as slippery as wet soap within minutes.

Badlands National Park Climate by Season

Winter (December to February)

The cold is dry and the skies are often clear, making winter more manageable than the numbers suggest. Total snowfall reaches 12 to 24 inches over the season, usually in short bursts driven by the Dakota wind. The Badlands Loop Road (SD Highway 240) gets priority for snow removal from the NPS, but it can close for several hours during blizzards. One significant advantage is that the park is nearly empty. Bison and other wildlife paw at the ground a few yards from your window, and the eroded formations take on a cool hue beneath the snow. Nighttime temperatures regularly fall to between 5 °F and -4 °F, so check your coolant before you hit the road.

Spring (March to May)

This is the most unpredictable season of the year. In March, a 59 °F day can be followed by a snowstorm. In April, the prairies turn green again and baby bison begin appearing across the landscape. May marks the start of thunderstorm season. Supercells can form quickly, and hail sometimes comes with the first spells of serious heat. The late-day light on the eroded buttes is beautiful. Keep your plans flexible.

Summer (June to August)

Peak season is also the most physically demanding. Temperatures regularly climb above 95 °F, and heat radiates from the ground long after sunset. Avoid the hiking trails between 11 a.m. and 4 p.m. Thunderstorms often break out in the late afternoon, sometimes with hail or tornadoes. That isn't an exaggeration. They develop quickly and without warning. The tradeoff is that sunrise over the buttes can be spectacular, and the golden morning light is well worth a 5:30 a.m. wake-up.

Fall (September to November)

September and October are our favorite months in Badlands National Park. Daytime temperatures range from 64 to 79 °F, crowds thin out noticeably, and the low autumn light reveals every shade of ocher, purple, and red in the geological formations. In November, the cold gradually settles in. Nights drop below freezing again by midmonth, and the first snow may fall.

Is It Cold or Hot in Badlands National Park? Records and Extremes

Both, with an intensity few parks can match. According to the NPS, recorded temperatures in Badlands National Park range from a historic low of -40 °F to a high of 117 °F. That's an 87-degree spread in one place. In practice, here's what that means on the ground:

• In July, the ground surface commonly rises above 140 °F in direct sun. That's hot enough to burn a dog's paws or the thin soles of city shoes.
• In January, wind makes the cold feel worse. A temperature of 5 °F can feel like -13 °F or colder in a strong gust.
• Sudden changes over a single day, with a difference of more than 36 °F between morning and afternoon, are common in spring and fall, especially when a front moves through.

What to Wear by Season

Winter: three required layers, including a thermal base layer, a fleece midlayer, and a waterproof, windproof shell. Wear a hat that covers your ears, warm gloves, and sturdy shoes with slip-resistant soles. A blanket in the trunk takes up little space and may come in handy.

Spring: versatility is key. Mornings can be cool at 50 °F, afternoons warm at 72 °F, and evenings rainy. A compact rain jacket in your daypack is essential. Choose closed-toe trail shoes. The clay trails become treacherous after even a light shower.

Summer: protect yourself from the sun as much as from the heat. Wear a wide-brimmed hat, lightweight long sleeves in breathable fabric, and sunscreen rated SPF 50 or higher. Bring at least 3 liters of water per person for a half-day visit. Outside the Ben Reifel Visitor Center, there are no places to refill water in the park.

Fall: this is the easiest season to manage. A lightweight layering system works well from September through mid-October. Starting in late October, treat the weather like spring and add a warm layer for the evening.

Alerts and Conditions to Watch

Supercell thunderstorms (June to August): storms can form in less than 30 minutes. If the western horizon darkens, get down from exposed buttes and overlooks immediately, then head to your vehicle or a sturdy building. Don't shelter beneath an isolated tree.

Hail: hailstones the size of golf balls have been recorded in the park. During a hailstorm, stay in your vehicle, park away from trees and utility poles, and wait until the storm ends before getting out.

Tornadoes: South Dakota lies along the edge of the American Tornado Alley. Tornadoes remain rare in the park, but they're not unheard of. If there's a warning, whether from a park siren or an NWS alert on your phone, find a concrete or stone shelter. A vehicle isn't a safe shelter during a tornado.

Roads and closures: roads outside the Badlands Loop Road quickly become impassable after rain, even in a 4WD vehicle. The NPS closes some sections in real time. Before leaving the pavement, check conditions at the Ben Reifel Visitor Center or on the park's official website.

Blizzards (December to March): SD Highway 240 can close for several hours during blowing snow. Check SD 511, South Dakota's road information service, before setting out in winter.

Frequently Asked Questions