Nashua, MT Climate

Climate Insight: Nashua, MT

An annual average temperature of 44°F, ranging from a mean daily high of 58°F to a mean daily low of 31°F is what the NOAA 1991–2020 climate normals report for Nashua, Montana. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00245983 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Nashua averages an uncharted amount of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 135 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 12 and the first fall freeze near September 24. As for energy demand, 8,134 heating degree days and 615 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Nashua scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.