September typically marks the transition from summer to fall in the Black Hills of South Dakota, where Mount Rushmore National Memorial is located. Visitors can expect average high temperatures ranging from the mid-60s to low 70s Fahrenheit (around 18-23 degrees Celsius), while average lows can dip into the 40s Fahrenheit (4-9 degrees Celsius). This period often sees fewer crowds than the peak summer months while still offering pleasant conditions for exploring the monument and surrounding areas.
Planning a visit during this time offers a balance between comfortable weather and manageable visitor numbers. Historically, September offers a window of opportunity to experience the natural beauty of the Black Hills with fewer crowds and potentially lower accommodation rates than the summer season. The crisp, cooler air and changing foliage add to the region’s scenic appeal. Understanding the typical climatic conditions for this time of year allows visitors to pack appropriate clothing and plan activities accordingly, maximizing their enjoyment of the area.
