Weather on September 15 at Yellowstone
Yellowstone National Park
Based on 55 years of data from Jackson, WY
Elevation Note: Yellowstone sits at 7,350 ft. Expect temperatures 26°F cooler than the data shown below, which comes from Jackson, WY at a lower elevation.
Planning Your Visit
September 15th in Yellowstone National Park (via Jackson, WY) typically brings pleasant fall weather, with average highs around 71°F and lows near 31°F — a 40°F daily swing. Over 55 years of records, the warmest September 15th was in 2015 (61°F average), while the coldest was 1971 (38°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 15th dates historically, with the wettest September 15th recording 1.78" 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 15th in Yellowstone? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 69°F | 37°F | 0.66" | 0" |
| 2024 | 70°F | 29°F | 0" | 0" |
| 2023 | 68°F | 29°F | 0" | 0" |
| 2022 | 65°F | 35°F | 0.3" | 0" |
| 2021 | 70°F | 26°F | 0" | 0" |
| 2020 | 79°F | 28°F | 0" | 0" |
| 2019 | 74°F | 32°F | 0" | 0" |
| 2018 | 73°F | 31°F | 0" | 0" |
| 2017 | 67°F | 46°F | 0.76" | 0" |
| 2016 | 58°F | 37°F | 0.3" | 0" |
| 2015 | 74°F | 49°F | 1.78" | 0" |
| 2014 | 72°F | 30°F | 0" | 0" |
| 2013 | 69°F | 45°F | 0.03" | 0" |
| 2012 | 76°F | 44°F | 0" | -- |
| 2011 | 68°F | 32°F | 0" | 0" |
| 2010 | 70°F | 27°F | 0.76" | 0" |
| 2009 | 75°F | 39°F | 1.6" | 0" |
| 2008 | 80°F | 27°F | 0" | 0" |
| 2007 | 76°F | 32°F | 0" | 0" |
| 2006 | 70°F | 45°F | -- | -- |
| 2005 | 68°F | 22°F | -- | -- |
| 2004 | 60°F | 31°F | 0.38" | -- |
| 2003 | 74°F | 25°F | -- | -- |
| 2002 | 80°F | 33°F | -- | -- |
| 2001 | 67°F | 30°F | -- | -- |
| 2000 | 88°F | 32°F | 0" | -- |
| 1999 | 73°F | 26°F | -- | -- |
| 1998 | 79°F | 35°F | -- | -- |
| 1997 | 49°F | 36°F | 1.27" | -- |
| 1996 | 64°F | 40°F | 0.25" | 0" |
| 1995 | 79°F | 26°F | 0" | 0" |
| 1994 | 63°F | 29°F | 0" | 0" |
| 1993 | 62°F | 29°F | 0" | 0" |
| 1992 | 74°F | 26°F | 0" | 0" |
| 1991 | 51°F | 30°F | 0.03" | 0" |
| 1990 | 88°F | 31°F | 0" | 0" |
| 1989 | 77°F | 25°F | 0" | 0" |
| 1988 | 69°F | 22°F | 0" | 0" |
| 1987 | 79°F | 30°F | 0" | 0" |
| 1986 | 68°F | 34°F | 0" | -- |
| 1985 | 74°F | 27°F | 0" | 0" |
| 1984 | 73°F | 32°F | 0.25" | 0" |
| 1983 | 73°F | 29°F | 0" | 0" |
| 1982 | 55°F | 29°F | 0.58" | 0" |
| 1981 | 81°F | 31°F | 0" | 0" |
| 1980 | 72°F | 30°F | 0" | 0" |
| 1979 | 82°F | 22°F | 0" | 0" |
| 1978 | 62°F | 26°F | 0" | 0" |
| 1977 | 72°F | 47°F | 0.28" | 0" |
| 1976 | 71°F | 27°F | 0" | 0" |
| 1975 | 74°F | 31°F | 0.08" | 0" |
| 1974 | 76°F | 21°F | 0" | 0" |
| 1973 | 62°F | 26°F | 0" | 0" |
| 1972 | 70°F | 23°F | 0" | 0" |
| 1971 | 59°F | 18°F | 0" | 0" |