Weather on March 21 at Glacier
Glacier National Park
Based on 56 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
March 21st in Glacier National Park (via Kalispell, MT) typically brings chilly spring weather, with average highs around 48°F and lows near 27°F. Over 56 years of records, the warmest March 21st was in 1999 (50°F average), while the coldest was 2002 (11°F) — a 39°F range across recorded history. Precipitation has occurred on 27% of recorded March 21st dates, with snow falling 4% of the time (heaviest snowfall: 2.9"). The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Glacier? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 53°F | 38°F | 0.03" | 0" |
| 2025 | 52°F | 33°F | 0.33" | 0" |
| 2024 | 53°F | 32°F | 0" | 0" |
| 2023 | 49°F | 21°F | 0" | 0" |
| 2022 | 43°F | 33°F | 0" | 0" |
| 2021 | 43°F | 32°F | 0" | 0" |
| 2020 | 58°F | 18°F | 0" | 0" |
| 2019 | 52°F | 19°F | 0" | 0" |
| 2018 | 49°F | 24°F | 0" | 0" |
| 2017 | 52°F | 36°F | 0.28" | 0" |
| 2016 | 57°F | 29°F | 0.2" | 0" |
| 2015 | 57°F | 35°F | 0" | 0" |
| 2014 | 36°F | 21°F | 0" | 0" |
| 2013 | 39°F | 27°F | 0" | 0" |
| 2012 | 37°F | 31°F | 0.76" | 0.3" |
| 2011 | 41°F | 34°F | 0.08" | 0" |
| 2010 | 50°F | 25°F | 0" | 0" |
| 2009 | 55°F | 33°F | 0.1" | 0" |
| 2008 | 40°F | 26°F | 0.1" | 0" |
| 2007 | 44°F | 26°F | 0" | 0" |
| 2006 | 51°F | 29°F | 0" | 0" |
| 2005 | 42°F | 24°F | 0" | 0" |
| 2004 | 56°F | 28°F | 0" | -- |
| 2003 | 47°F | 34°F | 0" | -- |
| 2002 | 22°F | 1°F | 0" | -- |
| 2001 | 55°F | 19°F | 0" | -- |
| 2000 | 48°F | 23°F | 0" | -- |
| 1999 | 68°F | 32°F | 0" | 0" |
| 1998 | 44°F | 28°F | 0.15" | 0" |
| 1997 | 44°F | 21°F | 0" | 0" |
| 1996 | 52°F | 23°F | 0" | 0" |
| 1995 | 44°F | 27°F | 0.05" | 0" |
| 1994 | 45°F | 25°F | 0" | 0" |
| 1993 | 48°F | 33°F | 0" | 0" |
| 1992 | 51°F | 24°F | 0" | 0" |
| 1991 | 50°F | 28°F | 0.03" | 0" |
| 1990 | 52°F | 31°F | 0.05" | 0" |
| 1989 | 43°F | 31°F | 0.05" | 0" |
| 1988 | 50°F | 35°F | 0" | 0" |
| 1987 | 45°F | 25°F | 0" | 0" |
| 1986 | 54°F | 27°F | 0" | 0" |
| 1985 | 35°F | 19°F | 0.51" | 2.9" |
| 1984 | 42°F | 35°F | 0.66" | 0" |
| 1983 | 51°F | 23°F | 0" | 0" |
| 1982 | 43°F | 30°F | 0" | 0" |
| 1981 | 52°F | 21°F | 0" | -- |
| 1980 | 53°F | 27°F | 0" | -- |
| 1979 | 58°F | 25°F | 0" | -- |
| 1978 | 58°F | 30°F | 0" | -- |
| 1977 | 44°F | 34°F | 0" | -- |
| 1976 | 42°F | 27°F | 0" | 0" |
| 1975 | 40°F | 17°F | 0" | -- |
| 1974 | 43°F | 30°F | 0" | -- |
| 1973 | 54°F | 30°F | 0" | 0" |
| 1972 | 58°F | 27°F | 0" | -- |
| 1971 | 46°F | 20°F | 0" | -- |