Monthly weather forecast and Climate
Cheyenne, WY US

Warmest month (with highest average high temperature) is July (83.4°F).
Month with lowest average high temperature is December (38.2°F).

Month with highest average low temperature is July (55.5°F).
Coldest month (with lowest average low temperature) is December (17.3°F).

Month with highest relative humidity is March (56.1%).
Month with lowest relative humidity is October (50%).

Wettest months (with highest rainfall) are May and June (2.3").
Driest month (with lowest rainfall) is January (0.3").

Month with highest number of rainy days is May (12.4 days).
Month with lowest number of rainy days is January (4.9 days).

Month with highest snowfall is March (11.3").
Months with lowest snowfall are June, July and August (0").

Month with highest number of snowfall days is March (7.8 days).
Months with lowest number of snowfall days are July and August (0 days).

Months with longest days are May, June and July (Average daylight: 15).
Month with shortest days is December (Average daylight: 9).

Month with most sunshine is July (Average sunshine: 10.2).
Month with least sunshine is December (Average sunshine: 5.7).

Months with highest UV index are June and July (UV index 10).
Month with lowest UV index is December (UV index 1).