Weather on December 21 at Grand Teton
Grand Teton National Park
Based on 54 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
December 21st in Grand Teton National Park (via Jackson, WY) typically brings very cold winter weather, with average highs around 28°F and lows near 8°F. Over 54 years of records, the warmest December 21st was in 2020 (35°F average), while the coldest was 1990 (-16°F) — a 51°F range across recorded history. Precipitation has occurred on 50% of recorded December 21st dates, with snow falling 41% of the time (heaviest snowfall: 6.3"). The last decade has been 9.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 9.8°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Grand Teton? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 36°F | 26°F | 0.51" | 0" |
| 2024 | 24°F | 0°F | 0" | 0" |
| 2023 | 33°F | 23°F | 0.05" | 0" |
| 2022 | 32°F | 25°F | 0.53" | 1.5" |
| 2021 | 39°F | 31°F | 0" | 0" |
| 2020 | 40°F | 31°F | 0" | 0" |
| 2019 | 37°F | 11°F | 0" | 0" |
| 2018 | 38°F | 6°F | 0.05" | 0.2" |
| 2017 | 36°F | 5°F | 0.18" | 1.5" |
| 2016 | 35°F | 15°F | 0.33" | 1.5" |
| 2015 | 28°F | 23°F | 0.13" | 1.1" |
| 2014 | 34°F | 30°F | 0.3" | 2" |
| 2013 | 22°F | 4°F | 0.1" | 0.5" |
| 2012 | 10°F | -12°F | 0" | 0" |
| 2011 | 27°F | 11°F | 0.2" | -- |
| 2010 | 22°F | 0°F | 0" | 0" |
| 2009 | 32°F | 4°F | 0.43" | 0" |
| 2008 | 21°F | -10°F | 0.2" | 1" |
| 2007 | 32°F | 16°F | 0.05" | 1" |
| 2006 | 18°F | -4°F | -- | -- |
| 2005 | 44°F | 17°F | -- | -- |
| 2004 | 29°F | 16°F | -- | -- |
| 2003 | 34°F | 5°F | -- | -- |
| 2002 | 26°F | 12°F | 0.15" | 1.5" |
| 2001 | 27°F | 2°F | 0" | 0" |
| 2000 | 22°F | -14°F | -- | -- |
| 1999 | 36°F | 7°F | 0.13" | 1.5" |
| 1998 | 10°F | -17°F | -- | 0" |
| 1997 | 11°F | 8°F | 0" | 0" |
| 1996 | 29°F | 24°F | 0.41" | 2" |
| 1995 | 22°F | 3°F | 0" | 0" |
| 1994 | 32°F | 17°F | 0.25" | -- |
| 1993 | 26°F | -4°F | 0.05" | 0.2" |
| 1992 | 27°F | 18°F | 0.2" | 0.7" |
| 1991 | 17°F | -16°F | 0" | 0" |
| 1990 | 1°F | -33°F | 0.03" | 0.1" |
| 1989 | 34°F | 22°F | 0" | 0" |
| 1988 | 32°F | 22°F | 0.69" | 4.7" |
| 1987 | 32°F | -11°F | 0.08" | 0.4" |
| 1986 | 15°F | -4°F | 0.03" | 0.2" |
| 1985 | 14°F | -9°F | -- | -- |
| 1983 | 0°F | -25°F | 0" | 0" |
| 1982 | 37°F | 8°F | 0.86" | 6.3" |
| 1981 | 36°F | 28°F | 0" | -- |
| 1980 | 40°F | 16°F | 0" | -- |
| 1979 | 38°F | 10°F | 0.05" | 2" |
| 1978 | 26°F | 15°F | 0" | 0" |
| 1977 | 19°F | -- | 0" | 0" |
| 1976 | 21°F | -14°F | 0" | 0" |
| 1975 | 22°F | -2°F | 0" | 0" |
| 1974 | 37°F | 14°F | 0.66" | 6" |
| 1973 | 35°F | 17°F | 0" | 0" |
| 1972 | 38°F | 28°F | 0.48" | 2" |
| 1971 | 39°F | 26°F | 0" | 0" |