Carlyle, MT Climate

Climate Insight: Carlyle, MT

An annual average temperature of 43°F, ranging from a mean daily high of 54°F to a mean daily low of 33°F is what the NOAA 1991–2020 climate normals report for Carlyle, Montana. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00241518 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. Carlyle sees about 16.8 inches of precipitation a year, with 55.3 inches typically falling as snow. The frost-free season averages 134 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 29. On the energy side, 8,320 heating degree days and 428 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Carlyle 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 are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.