Big Horn, WY Climate

Climate Insight: Big Horn, WY

The NOAA 1991–2020 climate normals describe Big Horn, Wyoming as a location with an annual average temperature of 46°F, ranging from a mean daily high of 58°F to a mean daily low of 33°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00480680, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Big Horn receives roughly 18.6 inches of precipitation each year, with 81.4 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 17 and the first fall freeze near September 28. For energy use, 7,471 heating degree days and 398 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Big Horn scores 44/100 (Moderate), 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 December-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.