Badlands National Park weather in September
September in Badlands National Park: warm, a little rain, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#3 of 12 months in Badlands National Park · #473 of 1413 destinations to visit in September · comfort 85/100 (tier A)
- Days
- 27°C
- Nights
- 11°C
- Wet days
- 6
- Sun
- 10.3 h
- Humidity
- 54%
- Daylight
- 13 h

Traveller notes on Badlands National Park in September
Badlands-forum threads on September visits call this a genuinely strong month, thinner crowds once kids return to school and a real drop in the odds of an afternoon thunderstorm compared to midsummer. Posters describe early September as still capable of running warm, while mid-month regulars call the sweet spot for temperatures settling into the comfortable fifties and sixties Fahrenheit. Regulars call lower lodging prices a genuine bonus of visiting after Labor Day, availability noticeably easier without the summer rush. Posters recommend an early or late-day visit for the best light on the eroded formations, midday sun called harsh for photography. Regulars describe wind as a real constant here across seasons, worth factoring into any exposed hike or overlook stop. Posters call September a real favorite for the combination of comfortable conditions and low crowds. The record: 27.2C days feeling like 25C, 10.8C nights, 54 percent humidity and 10.3 hours of sun.
Other months in Badlands National Park
Badlands-forum threads on a March visit describe snowstorms as a genuine possibility, posters naming late March into early April as when a real blizzard often hits. Regulars call average nighttime lows genuinely around twenty-six degrees Fahrenheit, several posters naming this standard cold for the month regardless of daytime conditions. Posters call the main loop road genuinely still open barring a big storm, several regulars naming Needles Highway and Iron Mountain Road nearby as staying closed until mid-April instead. Regulars call RV camping genuinely something most visitors avoid before Memorial Day, several threads naming cold nights as the real reason to wait for warmer months. Posters recommend real flexible plans and winter gear for a March visit, several regulars calling this standard given how quickly a blizzard can move through. The record: 10.3C days, -4.1C nights, 31.3mm across nearly 5 days and 62 percent humidity.
Badlands-forum threads on a February visit describe January and February weather as genuinely capable of turning nasty, posters calling this a real factor for anyone combining a Badlands stop with nearby Mount Rushmore or Jewel Cave. Regulars call Mount Rushmore's visibility a real gamble this time of year, fog sometimes obscuring the monument even on an otherwise clear-seeming day. Posters call the park itself generally accessible in February despite the cold, though conditions here shift enough that checking directly before setting out is worthwhile. Regulars recommend combining a Badlands stop with a Mitchell base for anyone driving through the region, a few hours' detour considered manageable for a weekend trip. Posters recommend real winter layers regardless of how the forecast looks that morning, conditions here changing fast on the open plains. The record: 3.2C days feeling like 1C, -10.4C nights, 13.5mm across over 3 days and 55 percent humidity.
Badlands-forum threads on a January or February visit call the weather potentially genuinely nasty, posters describing conditions as capable of swinging from a pleasant sunny day to a real blizzard within the same week. Regulars call the park open year-round, the loop road and overlooks accessible whenever conditions allow safe driving. Posters describe wildlife sightings as hit-or-miss even in warmer months, winter adding real unpredictability on top of that. Regulars recommend checking current road and weather conditions before the drive, a storm here capable of closing routes with little warning. Posters call a clear winter day genuinely spectacular, the eroded formations and layered rock taking on a stark character under a low winter sun. Regulars recommend real cold-weather layers regardless of forecast, wind chill here turning brutal fast once a front moves through. The record: 2.3C days feeling like -3C, -10.6C nights, 10.1mm across over 2 days and 67 percent humidity.
Badlands-forum threads on July confirm real heat is the norm, 85-90 Fahrenheit common and posters calling it a dry heat that stays broadly bearable, though the pale, eroded formations reflect sun in a way that makes exposed trails feel noticeably hotter than the thermometer reading. One long-time July visitor reports never once catching a full 100-degree day, occasionally getting lucky with overcast, comfortably cool stretches instead. Afternoon thunderstorms with real hail potential are called a standing possibility, and posters recommend timing exposed hikes for morning or early evening rather than midday. Nights cool down meaningfully after a hot day, a real jacket worth packing for camping regardless of how the daytime felt. Regulars call the early evening light on the formations the genuine highlight of a July visit. The record: a scorching 32.2C by day feeling like a punishing 33C, 16.8C nights, 55 percent humidity and 13.2 hours of sun.
Add your own note from Badlands National Park's card on the map.
Badlands National Park climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Badlands National Park in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsLabor Day weekend, Summer break in United States(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Badlands National Park's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherBadlands National Park's best weather comes in May, September and October — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Badlands National Park in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Holiday
Labor Day weekend
5–7 SepNational holidayCrowdedBook earlyLabor Day, the first Monday of September, is the last big getaway of summer: the long weekend books out campsites and lodging and fills parking early, and families thin out quickly once it has passed. Source ↗
Where is Badlands National Park?
Badlands National Park in September — FAQ
- Is September a good time to visit Badlands National Park?
- September in Badlands National Park: warm, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Badlands National Park on SeasonMap's comfort score (85/100).
- What is the weather like in Badlands National Park in September?
- In September, Badlands National Park averages a daily high of 27.2°C and a low of 10.8°C, with about 34 mm of rain over roughly 5.6 rainy days.
- What is the air quality in Badlands National Park in September?
- Badlands National Park has a mean US Air Quality Index of about 39 in September.