UV Index
UV Index
Today's UV index in Cheyenne, United States 
will be up to 9.4, indicating a very high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-08
With a UV index of 9.4 in Cheyenne, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
Cheyenne's UV index varies through the year, typically low in winter and peaking in summer around 6 to 8, indicating moderate to high sun exposure during summer months.
Cheyenne has cold winters with snow and mild summers. Spring and fall can be windy and change quickly, with temperatures swinging between warm and cold. Snow is common in winter and sometimes in spring or fall.
Compared to nearby Denver, Cheyenne is windier and slightly cooler due to its higher elevation. It gets less rain than places to the east but more snow than areas further south in Colorado and Nebraska.
See the UV index hour by hour for Cheyenne, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.