Weather on September 21 at Badlands
Badlands National Park
Based on 55 years of data from Rapid City, SD
Elevation Note: Badlands sits at 3,200 ft. Expect temperatures 11°F cooler than the data shown below, which comes from Rapid City, SD at a lower elevation.
Planning Your Visit
September 21st in Badlands National Park (via Rapid City, SD) typically brings mild fall weather, with average highs around 69°F and lows near 45°F. Over 55 years of records, the warmest September 21st was in 2015 (72°F average), while the coldest was 1995 (34°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 21st dates historically, with the wettest September 21st recording 4.88" of rain. The last decade has been 5.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.6°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Badlands? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 82°F | 53°F | 0" | 0" |
| 2024 | 66°F | 49°F | 0" | 0" |
| 2023 | 77°F | 53°F | 0" | 0" |
| 2022 | 59°F | 46°F | 0.13" | 0" |
| 2021 | 67°F | 44°F | 0" | 0" |
| 2020 | 78°F | 54°F | 0" | 0" |
| 2019 | 64°F | 48°F | 0.03" | 0" |
| 2018 | 61°F | 40°F | 0" | 0" |
| 2017 | 73°F | 50°F | 0" | 0" |
| 2016 | 71°F | 54°F | 0" | 0" |
| 2015 | 84°F | 59°F | 0" | 0" |
| 2014 | 72°F | 51°F | 0" | 0" |
| 2013 | 86°F | 43°F | 0" | 0" |
| 2012 | 76°F | 48°F | 0" | 0" |
| 2011 | 62°F | 42°F | 0" | 0" |
| 2010 | 73°F | 51°F | 0" | 0" |
| 2009 | 56°F | 46°F | 0" | 0" |
| 2008 | 82°F | 57°F | 0" | 0" |
| 2007 | 81°F | 48°F | 0" | 0" |
| 2006 | 61°F | 44°F | 0.05" | 0" |
| 2005 | 84°F | 55°F | 0" | 0" |
| 2004 | 47°F | 42°F | 0.18" | 0" |
| 2003 | 64°F | 44°F | 0.23" | 0" |
| 2002 | 54°F | 43°F | 0.03" | 0" |
| 2001 | 78°F | 45°F | 0" | 0" |
| 2000 | 60°F | 41°F | 0" | 0" |
| 1999 | 77°F | 48°F | 0" | 0" |
| 1998 | 48°F | 39°F | 1.45" | 0" |
| 1997 | 56°F | 47°F | 0" | 0" |
| 1996 | 62°F | 42°F | 0" | 0" |
| 1995 | 42°F | 26°F | 0.58" | 0" |
| 1994 | 78°F | 44°F | 0" | 0" |
| 1993 | 73°F | 38°F | 0" | 0" |
| 1992 | 80°F | 51°F | 0" | 0" |
| 1991 | 84°F | 41°F | 0" | 0" |
| 1990 | 62°F | 40°F | 0" | 0" |
| 1989 | 59°F | 46°F | 4.88" | 0" |
| 1988 | 66°F | 44°F | 0" | 0" |
| 1987 | 70°F | 39°F | 0" | 0" |
| 1986 | 59°F | 53°F | 0.03" | 0" |
| 1985 | 71°F | 40°F | 0" | 0" |
| 1984 | 76°F | 55°F | 0.03" | 0" |
| 1983 | 54°F | 25°F | 0" | 0" |
| 1982 | 77°F | 32°F | 0" | 0" |
| 1981 | 76°F | 41°F | 0" | 0" |
| 1980 | 74°F | 43°F | 0" | 0" |
| 1979 | 71°F | 48°F | 0" | 0" |
| 1978 | 68°F | 36°F | 0" | 0" |
| 1977 | 77°F | 57°F | 0" | 0" |
| 1976 | 79°F | 46°F | 0" | 0" |
| 1975 | 67°F | 30°F | 0" | 0" |
| 1974 | 65°F | 33°F | 0" | 0" |
| 1973 | 80°F | 51°F | 0.13" | 0" |
| 1972 | 75°F | 31°F | 0" | 0" |
| 1971 | 46°F | 38°F | 0.15" | 0" |