Weather on September 21 at Joshua Tree
Joshua Tree National Park
Based on 54 years of data from Palm Springs, CA
Elevation Note: Joshua Tree sits at 4,500 ft. Expect temperatures 16°F cooler than the data shown below, which comes from Palm Springs, CA at a lower elevation.
Planning Your Visit
September 21st in Joshua Tree National Park (via Palm Springs, CA) typically brings hot fall weather, with average highs around 98°F and lows near 70°F — a 28°F daily swing. Over 54 years of records, the warmest September 21st was in 2012 (96°F average), while the coldest was 2007 (69°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 21st dates historically, with the wettest September 21st recording 2.29" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for September 21st in Joshua Tree? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 92°F | 73°F | 0" | -- |
| 2024 | 97°F | 64°F | 0" | -- |
| 2023 | 90°F | 66°F | 0" | -- |
| 2022 | 98°F | 71°F | 0" | -- |
| 2021 | 105°F | 76°F | 0" | -- |
| 2020 | 106°F | 76°F | 0" | 0" |
| 2019 | 99°F | 71°F | 0" | 0" |
| 2018 | 102°F | 80°F | 0" | 0" |
| 2017 | 88°F | 67°F | 0" | 0" |
| 2016 | 80°F | 71°F | 0.69" | 0" |
| 2015 | 92°F | 81°F | 0" | 0" |
| 2014 | 100°F | 74°F | 0" | 0" |
| 2013 | 96°F | 66°F | 0" | -- |
| 2012 | 109°F | 82°F | 0" | -- |
| 2011 | 105°F | 73°F | 0" | -- |
| 2010 | 107°F | 70°F | 0" | 0" |
| 2009 | 108°F | 73°F | 0" | -- |
| 2008 | 96°F | 62°F | 0" | -- |
| 2007 | 78°F | 61°F | 0" | 0" |
| 2006 | 95°F | 64°F | 0" | 0" |
| 2005 | 102°F | 75°F | 0" | 0" |
| 2004 | 90°F | 67°F | 0" | 0" |
| 2003 | 110°F | 79°F | 0" | -- |
| 2002 | 104°F | 75°F | 0" | 0" |
| 2001 | 109°F | 70°F | 0" | 0" |
| 2000 | 102°F | 73°F | 0" | 0" |
| 1999 | 97°F | 76°F | 0" | 0" |
| 1998 | 87°F | 65°F | 0" | 0" |
| 1997 | 100°F | 69°F | 0" | 0" |
| 1996 | 96°F | 73°F | 0" | 0" |
| 1995 | 106°F | 74°F | 0" | 0" |
| 1994 | 100°F | 72°F | 0" | 0" |
| 1993 | 96°F | 64°F | 0" | 0" |
| 1992 | 100°F | 76°F | 0" | 0" |
| 1991 | 97°F | 74°F | 0" | 0" |
| 1990 | 90°F | 68°F | 0" | 0" |
| 1989 | 100°F | 68°F | 0" | 0" |
| 1988 | 82°F | 58°F | 0" | 0" |
| 1987 | 104°F | 73°F | 0" | 0" |
| 1986 | 90°F | 56°F | 0" | 0" |
| 1985 | 96°F | 65°F | 0" | 0" |
| 1983 | 94°F | 67°F | 2.29" | 0" |
| 1982 | 100°F | 67°F | 0" | 0" |
| 1981 | 101°F | 71°F | 0" | 0" |
| 1980 | 98°F | 64°F | 0" | 0" |
| 1979 | 107°F | 75°F | 0" | 0" |
| 1978 | 100°F | 65°F | 0" | 0" |
| 1977 | 95°F | 56°F | 0" | 0" |
| 1976 | 96°F | 67°F | 0" | 0" |
| 1975 | 108°F | 76°F | 0" | 0" |
| 1974 | 104°F | 75°F | 0" | 0" |
| 1973 | 100°F | 60°F | 0" | 0" |
| 1972 | 102°F | 75°F | 0" | 0" |
| 1971 | 96°F | 62°F | 0" | 0" |