UV Index
UV Index
Today's UV index in Denver, United States 
will be up to 11.9, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-20
UV index at 11.9 in Denver means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
Denver's UV index is generally high throughout the year, often ranging from moderate to very high, especially in summer months when it can reach 8 to 10. This is due to its high elevation and clear skies.
Denver experiences four distinct seasons. Winters are cold with snow, springs are mild with variable weather, summers are warm and dry, and falls bring cooler temperatures with colorful leaves. Sudden weather changes are common.
Compared to nearby cities and states, Denver is drier and sunnier than many places in the Rocky Mountain region. It has more sunshine than cities east of the Rockies but less humidity than areas further east or south like Kansas or New Mexico.
See the UV index hour by hour for Denver, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.