Weather on October 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
October 21st in Glacier National Park (via Kalispell, MT) typically brings cool fall weather, with average highs around 54°F and lows near 30°F. Over 55 years of records, the warmest October 21st was in 2003 (60°F average), while the coldest was 1984 (27°F) — a 33°F range across recorded history. Precipitation has occurred on 44% of recorded October 21st dates, with snow falling 4% of the time. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Glacier? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 56°F | 28°F | 0" | 0" |
| 2024 | 65°F | 43°F | 0.25" | 0" |
| 2023 | 68°F | 35°F | 0" | 0" |
| 2022 | 57°F | 39°F | 0.48" | 0" |
| 2021 | 60°F | 28°F | 0" | 0" |
| 2020 | 40°F | 27°F | 0.43" | 0.3" |
| 2019 | 47°F | 35°F | 0.03" | 0" |
| 2018 | 65°F | 20°F | 0" | 0" |
| 2017 | 47°F | 38°F | 0.38" | 0" |
| 2016 | 48°F | 34°F | 0.25" | 0" |
| 2015 | 59°F | 31°F | 0" | 0" |
| 2014 | 51°F | 38°F | 0.46" | 0" |
| 2013 | 59°F | 24°F | 0" | 0" |
| 2012 | 45°F | 24°F | 0.03" | 0" |
| 2011 | 57°F | 30°F | 0" | 0" |
| 2010 | 63°F | 23°F | 0" | 0" |
| 2009 | 46°F | 29°F | 0.05" | 0" |
| 2008 | 54°F | 27°F | 0" | 0" |
| 2007 | 50°F | 29°F | 0" | 0" |
| 2006 | 53°F | 28°F | 0.03" | 0" |
| 2005 | 55°F | 29°F | 0" | 0" |
| 2004 | 48°F | 34°F | 0.46" | 0" |
| 2003 | 75°F | 45°F | 0" | -- |
| 2002 | 60°F | 22°F | 0" | -- |
| 2001 | 45°F | 26°F | 0.43" | -- |
| 2000 | 49°F | 27°F | 0.05" | -- |
| 1999 | 63°F | 22°F | 0" | -- |
| 1998 | 56°F | 22°F | 0" | 0" |
| 1997 | 54°F | 24°F | 0" | 0" |
| 1996 | 42°F | 20°F | 0" | 0" |
| 1995 | 48°F | 29°F | 0.18" | 0" |
| 1994 | 53°F | 33°F | 0.33" | 0" |
| 1993 | 56°F | 24°F | 0" | 0" |
| 1992 | 58°F | 28°F | 0" | 0" |
| 1991 | 60°F | 39°F | 0.13" | 0" |
| 1990 | 40°F | 28°F | 1.22" | 0" |
| 1989 | 51°F | 43°F | 0.46" | 0" |
| 1988 | 63°F | 32°F | 0" | 0" |
| 1987 | 60°F | 19°F | 0" | 0" |
| 1986 | 46°F | 35°F | 0" | 0" |
| 1985 | 56°F | 34°F | 0.1" | 0" |
| 1984 | 38°F | 17°F | 0" | 0" |
| 1983 | 54°F | 25°F | 0" | 0" |
| 1982 | 50°F | 16°F | 0" | 0" |
| 1981 | 45°F | 19°F | 0" | 0" |
| 1980 | 56°F | 34°F | 0.71" | 0.3" |
| 1979 | 44°F | 31°F | 0.28" | 0" |
| 1978 | 60°F | 40°F | 0.13" | 0" |
| 1977 | 58°F | 27°F | 0" | 0" |
| 1976 | 52°F | 25°F | 0" | 0" |
| 1975 | 47°F | 35°F | 0.41" | -- |
| 1974 | 60°F | 44°F | 0" | -- |
| 1973 | 60°F | 39°F | 0" | -- |
| 1972 | 47°F | 37°F | 0" | -- |
| 1971 | 51°F | 29°F | 0.03" | -- |