West Glacier weather by month
What a typical year looks like in West Glacier, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Hungry Horse Dam, 17 km from West Glacier; records cover 1947–2026.
The year at a glance
- Precipitation a year
- 34.6 in879 mm
- Snow a year
- Rare
- Last spring freeze
- May 12
- First fall freeze
- Sep 30
- Heating degree days
- 7,787
- Cooling degree days
- 293
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −8°−22° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
West Glacier in January
Highs average 31°−1° and lows 20°−7°, with 3.6 in92 mm of precipitation in a typical January.
- Record high
- 56°13° (2012)
- Record low
- −40° (1950)
- Heating degree days
- 1234
- Cooling degree days
- 0
West Glacier in February
Highs average 34°1° and lows 20°−7°, with 2.5 in64 mm of precipitation in a typical February.
- Record high
- 62°17° (1995)
- Record low
- −34°−37° (1950)
- Heating degree days
- 1065
- Cooling degree days
- 0
West Glacier in March
Highs average 43°6° and lows 25°−4°, with 3.2 in82 mm of precipitation in a typical March.
- Record high
- 69°21° (2004)
- Record low
- −26°−32° (1960)
- Heating degree days
- 953
- Cooling degree days
- 0
West Glacier in April
Highs average 53°11° and lows 32°0°, with 2.7 in67 mm of precipitation in a typical April.
- Record high
- 86°30° (1987)
- Record low
- 2°−17° (2002)
- Heating degree days
- 680
- Cooling degree days
- 0
West Glacier in May
Highs average 64°18° and lows 41°5°, with 2.9 in73 mm of precipitation in a typical May.
- Record high
- 95°35° (1986)
- Record low
- 12°−11° (1954)
- Heating degree days
- 404
- Cooling degree days
- 4
West Glacier in June
Highs average 71°22° and lows 47°8°, with 3.8 in97 mm of precipitation in a typical June.
- Record high
- 102°39° (2015)
- Record low
- 26°−3° (1951)
- Heating degree days
- 207
- Cooling degree days
- 27
West Glacier in July
Highs average 82°28° and lows 53°12°, with 1.4 in36 mm of precipitation in a typical July.
- Record high
- 103°39° (2007)
- Record low
- 34°1° (1951)
- Heating degree days
- 54
- Cooling degree days
- 134
West Glacier in August
Highs average 81°27° and lows 52°11°, with 1.2 in31 mm of precipitation in a typical August.
- Record high
- 102°39° (2018)
- Record low
- 21°−6° (2005)
- Heating degree days
- 65
- Cooling degree days
- 114
West Glacier in September
Highs average 69°21° and lows 44°7°, with 2.2 in56 mm of precipitation in a typical September.
- Record high
- 97°36° (1998)
- Record low
- 20°−7° (1985)
- Heating degree days
- 272
- Cooling degree days
- 14
West Glacier in OctoberThis month
Highs average 52°11° and lows 35°2°, with 3.5 in89 mm of precipitation in a typical October.
- Record high
- 81°27° (2006)
- Record low
- 4°−16° (2002)
- Heating degree days
- 666
- Cooling degree days
- 0
West Glacier in November
Highs average 38°3° and lows 28°−2°, with 3.9 in99 mm of precipitation in a typical November.
- Record high
- 64°18° (1983)
- Record low
- −14°−26° (1993)
- Heating degree days
- 972
- Cooling degree days
- 0
West Glacier in December
Highs average 31°−1° and lows 21°−6°, with 3.7 in93 mm of precipitation in a typical December.
- Record high
- 60°16° (2021)
- Record low
- −28°−33° (1968)
- Heating degree days
- 1215
- Cooling degree days
- 0