UV Index Today in Denver, Colorado
Hourly UV Index Chart
Safe Exposure Time
Estimated based on the Fitzpatrick scale for skin color and a UV Index of
*Estimate assumes proper application of broad spectrum sunscreen with reapplication every 2 hours.
Important Safety Information
General Guidelines
These exposure times are estimates based on scientific research and should be used as general guidelines only. Individual responses to UV exposure may vary.
Affecting Factors
UV exposure is affected by: time of day, season, altitude, cloud cover, reflection from surfaces, and individual skin sensitivity.
Protection Tips
For proper sun protection: seek shade during peak UV hours (10 AM - 4 PM), wear protective clothing, use broad-spectrum sunscreen, and monitor the UV index regularly.
Medical Advice
Consult with a healthcare provider for personalized sun protection advice, especially if you have a history of skin conditions or are taking medications that may increase sun sensitivity.
SUNSET & SUNRISE
Denver's UV Climate
Denver, located in the Rocky Mountains of Colorado, experiences a semi-arid climate with extremely high UV exposure due to its high elevation. The city's mile-high altitude, clear skies, and southern latitude result in some of the highest UV radiation levels in the United States. The combination of outdoor activities, mountain recreation, and thin atmosphere makes comprehensive sun protection critical for residents and visitors, especially during high-altitude activities.
Average Annual UV Index
8.9
Peak UV Season
April - September
Sunny Days per Year
300
Practical Tips for Outdoor Activities
Make the most of outdoor activities while staying safe in Denver County:
- Check UV index and weather radar before planning outdoor activities
- Schedule outdoor activities during low UV hours
- Use appropriate sun protection based on UV levels
- Stay hydrated during outdoor activities
- Take regular breaks in shaded areas
- Monitor weather conditions for changes
- Be prepared for sudden weather changes
- Know the signs of heat-related illness
- Wear a hat and protective clothing
- Check visibility conditions before outdoor plans
- Stay alert to weather alerts and warnings
UV and Weather in Denver County
Learn about Denver County's unique climate patterns, UV radiation levels, and how they affect your daily life. Enter your zip code for location-specific weather radar data and UV forecasts to help you make informed decisions about outdoor activities and sun protection.
Climate and UV Patterns
Denver's high-altitude climate creates extreme UV exposure conditions with very high to extreme UV levels for most of the year. The city receives intense UV radiation due to its elevation of 5,280 feet, which reduces atmospheric filtering of UV rays. UV index values frequently reach 10+ during peak hours, even in winter. Local weather radar shows abundant sunshine throughout the year, with minimal cloud cover providing maximum UV exposure. The thin mountain air means UV radiation is more intense than at sea level.
UV Index and Health Impact
Understanding UV radiation levels is crucial for protecting your health. The UV index in Denver County varies throughout the year:
- Summer (April-September): High to Very High UV (7-10+)
- Spring/Fall: Moderate to High UV (5-7)
- Winter: Moderate UV (4-6)
- Peak UV hours: 10 AM - 4 PM
- Cloudy conditions: UV reduced by 20-40%
- Clear skies: Maximum UV exposure
- Visibility conditions affect UV intensity
Local Weather Patterns
Denver's weather patterns create unique UV exposure challenges throughout the year. The city experiences a semi-arid climate with abundant sunshine and minimal precipitation. Summer months bring hot temperatures and maximum UV exposure, while winter months bring snow and cold temperatures but still feature high UV levels due to high elevation and clear skies. The city's mountain location means UV radiation is amplified by snow reflection during winter months. Spring and fall bring variable weather but consistently high UV levels due to elevation and southern latitude.