Alder, MT Climate

Climate Insight: Alder, MT

Based on 2 weather stations feeding NOAA's 1991–2020 climate normals, Alder, Montana averages 43°F a year, ranging from a mean daily high of 55°F to a mean daily low of 30°F. July is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.

Alder averages 14.1 inches of precipitation a year, with 57.2 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 100 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 6 and the first fall freeze near September 14. As for energy demand, 8,319 heating degree days and 130 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Alder scores 34/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.