Weather on September 23 at Grand Teton
Grand Teton National Park
Based on 55 years of data from Jackson, WY
Elevation Note: Grand Teton sits at 6,800 ft. Expect temperatures 24°F cooler than the data shown below, which comes from Jackson, WY at a lower elevation.
Planning Your Visit
September 23rd in Grand Teton National Park (via Jackson, WY) typically brings mild fall weather, with average highs around 66°F and lows near 30°F — a 36°F daily swing. Over 55 years of records, the warmest September 23rd was in 2007 (59°F average), while the coldest was 1985 (33°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 23rd dates historically, with the wettest September 23rd recording 2.08" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 23rd in Grand Teton? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 60°F | 27°F | 0.18" | 0" |
| 2024 | 69°F | 29°F | 0" | 0" |
| 2023 | 48°F | 39°F | 0.33" | 0" |
| 2022 | 72°F | 40°F | 0.2" | 0" |
| 2021 | 69°F | 29°F | 0" | 0" |
| 2020 | 73°F | 28°F | 0" | 0" |
| 2019 | 60°F | 28°F | 0" | 0" |
| 2018 | 74°F | 35°F | 0" | 0" |
| 2017 | 48°F | 30°F | 0.03" | 0" |
| 2016 | 63°F | 43°F | 2.08" | 0" |
| 2015 | 76°F | 30°F | 0" | 0" |
| 2014 | 60°F | 45°F | 0.08" | 0" |
| 2013 | 66°F | 43°F | 0" | 0" |
| 2012 | 66°F | 46°F | 0" | -- |
| 2011 | 76°F | 26°F | 0" | 0" |
| 2010 | 70°F | 26°F | 0.13" | 0" |
| 2009 | 74°F | 26°F | 0" | 0" |
| 2008 | 58°F | 41°F | 0" | 0" |
| 2007 | 71°F | 47°F | 0" | 0" |
| 2006 | 55°F | 31°F | -- | -- |
| 2005 | 67°F | 39°F | 0.56" | -- |
| 2004 | 59°F | 39°F | -- | -- |
| 2003 | 76°F | 25°F | -- | -- |
| 2002 | 70°F | 24°F | -- | -- |
| 2001 | 79°F | 26°F | -- | -- |
| 2000 | 42°F | 26°F | -- | -- |
| 1999 | 77°F | 28°F | -- | -- |
| 1998 | 66°F | 27°F | -- | -- |
| 1997 | 66°F | 33°F | 0.15" | 0" |
| 1996 | 64°F | 19°F | 0" | 0" |
| 1995 | 63°F | 35°F | 0" | 0" |
| 1994 | 74°F | 20°F | 0" | 0" |
| 1993 | 67°F | 23°F | 0" | 0" |
| 1992 | 82°F | 30°F | 0" | 0" |
| 1991 | 61°F | 22°F | 0" | 0" |
| 1990 | 74°F | 27°F | 0" | 0" |
| 1989 | 73°F | 28°F | 0" | 0" |
| 1988 | 72°F | 20°F | 0" | 0" |
| 1987 | 84°F | 27°F | 0" | 0" |
| 1986 | 64°F | 20°F | 0" | -- |
| 1985 | 49°F | 17°F | 0.03" | 0" |
| 1984 | 51°F | 35°F | 1.04" | 0" |
| 1983 | 73°F | 40°F | 0" | 0" |
| 1982 | 75°F | 32°F | 0" | 0" |
| 1981 | 70°F | 25°F | 0" | 0" |
| 1980 | 60°F | 23°F | 0" | 0" |
| 1979 | 78°F | 24°F | 0" | 0" |
| 1978 | 74°F | 23°F | 0" | 0" |
| 1977 | 49°F | 35°F | 0.23" | 0" |
| 1976 | 64°F | 37°F | 0.05" | 0" |
| 1975 | 75°F | 20°F | 0" | 0" |
| 1974 | 74°F | 23°F | 0" | 0" |
| 1973 | 47°F | 38°F | 0.76" | 0" |
| 1972 | 58°F | 44°F | 0" | 0" |
| 1971 | 70°F | 20°F | 0" | 0" |