Wilsall, MT Climate

Climate Insight: Wilsall, MT

Wilsall, Montana runs an annual average of 41°F, ranging from a mean daily high of 53°F to a mean daily low of 28°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while December is the coldest. Drawn from 2 weather stations, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.

Beyond temperature, Wilsall averages 19.3 inches of precipitation annually, with 81.7 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 91 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 8 and the first fall freeze near September 7. Turning to energy use, 8,878 heating degree days and 59 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Wilsall scores 34/100 (Below Average), 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.