W Glacier, MT Climate

Climate Insight: W Glacier, MT

An annual average temperature of 43°F, ranging from a mean daily high of 53°F to a mean daily low of 33°F is what the NOAA 1991–2020 climate normals report for W Glacier, Montana. July is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00248809 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. W Glacier sees about 30.9 inches of precipitation a year, with 115.2 inches typically falling as snow. The frost-free season averages 125 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 18 and the first fall freeze near September 20. On the energy side, 8,080 heating degree days and 138 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, W Glacier scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.