Cheyenne (WY) Weather & Climate: Best Time to Visit

In Cheyenne, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a chilly 3°C (37°F) in the coolest month, December.

Nights vary from 13°C (55°F) in July to around -9°C (16°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Cheyenne typically sees modest rain/snowfall throughout the year, with an average annual precipitation of 436 mm (17 in). The climate in Cheyenne shows significant variation throughout the year. Expect moderate rainfall in May, the wettest month, with an average of 68 mm (2.7 in) of precipitation over 15 rainy days.

In contrast, the driest month January offers drier and sunnier days, with around 7.7 mm (0.3 in) of snow/rainfall over 4 snowy/rainy days. For more details, please visit our Cheyenne Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Cheyenne serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.7 hours of sunshine daily, and embrace the darker days in December, offering only 5.9 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is moderate throughout the year in Cheyenne.

The city experiences its highest humidity in March, reaching 57%. In October, the humidity drops to its lowest level at 51%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year