Jeffrey City, WY Climate

Climate Insight: Jeffrey City, WY

Based on station USC00484925 feeding NOAA's 1991–2020 climate normals, Jeffrey City, Wyoming averages 42°F a year, ranging from a mean daily high of 56°F to a mean daily low of 28°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Jeffrey City sees about 9.9 inches of precipitation a year, with 60.2 inches typically falling as snow. The frost-free season averages 104 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 1 and the first fall freeze near September 13. On the energy side, 8,486 heating degree days and 230 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Jeffrey City scores 24/100 (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.