Cheyenne, WY Climate

Summary Graph

The summary climate graph for Cheyenne, WY shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Cheyenne, WY.


The warmest month in Cheyenne Regional Jerry Olson Field, Cheyenne, Wyoming is July with an average high temperature of 84.0°F. The hottest day on record was June 23 1954 when the temperature hit 100.0°F. During January the overnight temperature drops to an average of 17.1°F with the lowest temperature of -29.0°F being recorded on January 18 1984.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

23 Jun 1954100°F
7 Jul 197398.6°F
31 Jul 200298.1°F
1 Aug 200298.1°F
18 Jul 200398.1°F

The warmest months on average were:

July 200392.1°F
July 200890.4°F
July 200290.1°F
July 200589.6°F
July 200089°F

The coldest days on record are:

18 Jan 1984-29°F
22 Dec 1983-27.9°F
22 Dec 1989-27.9°F
23 Dec 1990-27.9°F
12 Jan 1963-26°F

The coldest months on average were:

December 19833.4°F
January 19495.8°F
January 19636.3°F
January 19796.4°F
February 19896.7°F


The wettest month in Cheyenne, WY is July with an average of 1.4 inches of rain falling on 15 to 16 days. The driest month in Cheyenne, WY is January with an average of 0.2 inches of rain falling on 0 to 1 days.

Wettest Days

The wettest days on record are:

20 July 19732.8 inches
13 July 20112.5 inches
4 July 20061.9 inches
13 July 19811.7 inches
23 July 19911.6 inches

Wettest Months

The wettest months on record are:

August 19856.7 inches
August 20086.6 inches
May 19956.3 inches
July 20115.8 inches
May 19815.6 inches

Driest Months

The driest months on record are:

February 19480 inches
March 19480 inches
April 19480 inches
May 19480 inches
June 19480 inches