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CHEYENNE,WYOMING <br /> Average Monthly <br /> Temperature (°F) Average Monthly <br /> Precipitation <br /> Maximum Minimum <br /> January 37.8 15.7 0.42 <br /> February 40.1 17.5 0.52 <br /> March 45.0 22.1 1.05 <br /> April 53.9 29.9 1.75 <br /> May 63.8 39.1 2.38 <br /> June 74.8 48.1 2.06 <br /> July 82.7 54.7 2.07 <br /> August 80.6 53.1 1.64 <br /> September 71.6 43.9 1.26 <br /> October 59.7 33.7 0.94 <br /> November 46.5 23.7 0.61 <br /> December 39.4 17.6 0.47 <br /> Mean/Total 58.0 33.3 15.17 <br /> Carr Pit East <br /> DRMS 112 Permit Application Page 25 <br />