Weather on December 20 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 20th in Glacier National Park (via Kalispell, MT) typically brings very cold winter weather, with average highs around 30°F and lows near 17°F. Over 55 years of records, the warmest December 20th was in 2019 (43°F average), while the coldest was 2008 (-9°F) — a 52°F range across recorded history. Precipitation has occurred on 49% of recorded December 20th dates, with snow falling 27% of the time (heaviest snowfall: 8.9"). 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 20th 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 | 38°F | 28°F | 0" | 0" |
| 2024 | 46°F | 28°F | 0" | 0" |
| 2023 | 38°F | 31°F | 0.05" | 0" |
| 2022 | 5°F | -3°F | 1.22" | 8.9" |
| 2021 | 23°F | 4°F | 0.36" | 1.3" |
| 2020 | 48°F | 28°F | 0.33" | 0" |
| 2019 | 51°F | 36°F | 0.03" | 0" |
| 2018 | 42°F | 29°F | 0.18" | 0" |
| 2017 | 29°F | -1°F | 0.2" | 3" |
| 2016 | 41°F | 26°F | 0.23" | 0.2" |
| 2015 | 34°F | 22°F | 0" | 0" |
| 2014 | 36°F | 25°F | 0.1" | 0" |
| 2013 | 22°F | 12°F | 0.53" | 5.4" |
| 2012 | 38°F | 28°F | 0" | 0" |
| 2011 | 34°F | 22°F | 0" | 0" |
| 2010 | 24°F | 13°F | 0.1" | 0" |
| 2009 | 36°F | 33°F | 1.22" | 0" |
| 2008 | 4°F | -22°F | 0" | 0" |
| 2007 | 41°F | 31°F | 0" | 0" |
| 2006 | 22°F | 4°F | 0" | 0" |
| 2005 | 23°F | 13°F | 0.03" | 0" |
| 2004 | 39°F | 23°F | 0" | 0" |
| 2003 | 25°F | 19°F | 0.05" | -- |
| 2002 | 30°F | 20°F | 0" | -- |
| 2001 | 28°F | 13°F | 0" | -- |
| 2000 | 18°F | -13°F | 0" | -- |
| 1999 | 30°F | 25°F | 0" | -- |
| 1998 | 4°F | -12°F | 0" | 0" |
| 1997 | 32°F | 18°F | 0.15" | 0.8" |
| 1996 | 27°F | 15°F | 0.53" | 2.5" |
| 1995 | 32°F | 28°F | 0" | 0" |
| 1994 | 49°F | 23°F | 0" | 0" |
| 1993 | 32°F | 24°F | 0" | 0.1" |
| 1992 | 33°F | 20°F | 0.43" | 3.2" |
| 1991 | 34°F | 11°F | 0" | 0" |
| 1990 | -2°F | -11°F | 0" | 0" |
| 1989 | 25°F | 6°F | 0.3" | 1.2" |
| 1988 | 26°F | 1°F | 0.13" | 0.6" |
| 1987 | 26°F | -1°F | 0.05" | 0.4" |
| 1986 | 28°F | 22°F | 0" | 0" |
| 1985 | 30°F | 27°F | 0" | 0" |
| 1984 | 20°F | 11°F | 0.33" | 1.5" |
| 1983 | 3°F | -4°F | 0" | 0" |
| 1982 | 29°F | 21°F | 0.79" | 3.3" |
| 1981 | 43°F | 22°F | 0" | -- |
| 1980 | 25°F | 20°F | 0.81" | 3.2" |
| 1979 | 44°F | 32°F | 0" | 0" |
| 1978 | 32°F | 20°F | 0" | -- |
| 1977 | 26°F | 14°F | 0" | -- |
| 1976 | 30°F | 15°F | 0" | -- |
| 1975 | 26°F | 22°F | 0.05" | -- |
| 1974 | 40°F | 31°F | 0.13" | -- |
| 1973 | 33°F | 23°F | 0.08" | -- |
| 1972 | 43°F | 34°F | 0" | -- |
| 1971 | 31°F | 22°F | 0.13" | -- |