Dayton, WY Climate

Climate Insight: Dayton, WY

An annual average temperature of 44°F, ranging from a mean daily high of 58°F to a mean daily low of 29°F is what the NOAA 1991–2020 climate normals report for Dayton, Wyoming. July is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00482399 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Dayton averages 18.0 inches of precipitation a year, with 68.3 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 117 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 24 and the first fall freeze near September 18. As for energy demand, 7,972 heating degree days and 294 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Dayton 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.