United States
UV Index in Wyoming — Current UV Levels
Check the current UV index for 1 cities in Wyoming. Select a city below for real-time UV data, hourly forecasts, and sun protection advice.
UV Index by City in Wyoming
Sun Safety in Wyoming
UV levels in Wyoming vary by season, altitude, and proximity to water. The WHO recommends sun protection whenever UV reaches 3 or higher. Apply SPF 30+ before outdoor activities and reapply every 2 hours.
UV Index in Wyoming: What to Know
Wyoming has high UV for its latitude because of its elevation — its high plains and mountains see strong summer UV, amplified by spring snow reflection.
Across Wyoming, the UV index peaks in the four hours around solar noon (roughly noon to 3 PM local time). The World Health Organization recommends sun protection whenever the UV index reaches 3 or higher: apply broad-spectrum SPF 30 at UV 3–5, SPF 50 at UV 6–7, and SPF 50+ with reapplication every two hours at UV 8 and above. Check the live, hour-by-hour UV index for Cheyenne on the city pages above before heading outdoors.
Common Questions About UV in Wyoming
When is the UV index highest in Wyoming?
UV in Wyoming is strongest between noon and 3 PM local time, and highest in the summer months when the sun sits highest in the sky. Check the hourly chart for Cheyenne above to see today's exact peak.
Do I need sunscreen in Wyoming?
Yes — whenever the UV index reaches 3 or higher, which in Wyoming covers most of the daytime hours from spring through fall. Even on cloudy days, up to 80% of UV can reach the ground.
How accurate is this UV data for Wyoming?
Our UV index for Wyoming comes from Open-Meteo, which aggregates national weather-service models, and updates every 15 minutes. Levels follow the official WHO global solar UV index scale.