Weather on December 21 at Glacier
Glacier National Park
Based on 55 years of data from Kalispell, MT
Elevation Note: Glacier sits at 4,500 ft. Expect temperatures 16°F cooler than the data shown below, which comes from Kalispell, MT at a lower elevation.
Planning Your Visit
December 21st in Glacier National Park (via Kalispell, MT) typically brings very cold winter weather, with average highs around 30°F and lows near 16°F. Over 55 years of records, the warmest December 21st was in 2019 (47°F average), while the coldest was 1990 (-15°F) — a 62°F range across recorded history. Precipitation has occurred on 56% of recorded December 21st dates, with snow falling 25% of the time (heaviest snowfall: 10.2"). The last decade has been 6.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.5°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Glacier? 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 | 24°F | 0.03" | 0" |
| 2024 | 36°F | 22°F | 0.03" | 0" |
| 2023 | 41°F | 31°F | 0" | 0" |
| 2022 | -3°F | -13°F | 0.1" | 0" |
| 2021 | 24°F | 9°F | 0.03" | 0" |
| 2020 | 38°F | 30°F | 0.69" | 0.3" |
| 2019 | 54°F | 40°F | 0" | 0" |
| 2018 | 40°F | 25°F | 0" | 0" |
| 2017 | 24°F | 2°F | 0.25" | 3" |
| 2016 | 35°F | 8°F | 0" | 0" |
| 2015 | 36°F | 20°F | 0.89" | 5.2" |
| 2014 | 46°F | 32°F | 0.51" | 0" |
| 2013 | 23°F | 14°F | 0" | 0" |
| 2012 | 36°F | 30°F | 0.13" | 0" |
| 2011 | 40°F | 12°F | 0.03" | 0" |
| 2010 | 31°F | 8°F | 0" | 0" |
| 2009 | 39°F | 32°F | 0.18" | 0" |
| 2008 | 6°F | -22°F | 0.23" | 0.8" |
| 2007 | 32°F | 12°F | 0" | 0" |
| 2006 | 24°F | 10°F | 0.03" | 0" |
| 2005 | 29°F | 17°F | 0" | 0" |
| 2004 | 33°F | 16°F | 0.2" | 1.1" |
| 2003 | 31°F | 25°F | 0" | -- |
| 2002 | 32°F | 18°F | 0" | -- |
| 2001 | 26°F | 23°F | 0.03" | -- |
| 2000 | 16°F | -12°F | 0.15" | -- |
| 1999 | 31°F | 18°F | 0" | -- |
| 1998 | 4°F | -14°F | 0" | 0" |
| 1997 | 34°F | 26°F | 0" | 0" |
| 1996 | 19°F | 5°F | 1.22" | 10.2" |
| 1995 | 33°F | 28°F | 0" | 0" |
| 1994 | 45°F | 24°F | 0" | 0" |
| 1993 | 31°F | 20°F | 0.03" | 0.1" |
| 1992 | 34°F | 19°F | 0" | 0" |
| 1991 | 30°F | 16°F | 0.08" | 0.7" |
| 1990 | -6°F | -25°F | 0" | 0" |
| 1989 | 16°F | 7°F | 0.1" | 0.4" |
| 1988 | 30°F | 18°F | 0.3" | 1.3" |
| 1987 | 33°F | 22°F | 0.2" | 1.5" |
| 1986 | 28°F | 20°F | 0" | 0" |
| 1985 | 27°F | 22°F | 0" | 0" |
| 1984 | 30°F | 17°F | 0.08" | 0.7" |
| 1983 | -3°F | -25°F | 0" | 0" |
| 1982 | 34°F | 29°F | 0.41" | 1.2" |
| 1981 | 35°F | 9°F | 0" | -- |
| 1980 | 38°F | 25°F | 1.02" | 1.6" |
| 1979 | 42°F | 28°F | 0.03" | 0" |
| 1978 | 37°F | 28°F | 0.15" | -- |
| 1977 | 23°F | 10°F | 0" | -- |
| 1976 | 26°F | 15°F | 0" | -- |
| 1975 | 26°F | 21°F | 0" | -- |
| 1974 | 49°F | 32°F | 0.41" | -- |
| 1973 | 37°F | 30°F | 0.41" | -- |
| 1972 | 42°F | 34°F | 1.78" | -- |
| 1971 | 41°F | 24°F | 0.03" | -- |