Plentywood, MT Climate

Climate Insight: Plentywood, MT

In Plentywood, Montana, the NOAA 1991–2020 climate normals put the annual average temperature at 39°F, ranging from a mean daily high of 53°F to a mean daily low of 26°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00246586, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Plentywood averages 14.7 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 112 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 25 and the first fall freeze near September 14. As for energy demand, 9,573 heating degree days and 296 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Plentywood 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 January-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.