Centennial, WY Climate

Climate Insight: Centennial, WY

In Centennial, Wyoming, the NOAA 1991–2020 climate normals put the annual average temperature at 41°F, ranging from a mean daily high of 54°F to a mean daily low of 28°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00481610, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Centennial sees about an uncharted amount of precipitation a year, predominantly as rainfall. The frost-free season averages 109 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 2 and the first fall freeze near September 19. On the energy side, 8,903 heating degree days and 41 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Centennial scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.