UV index today in Boulder, CO
UV Index
Very high
Today's UV index is very high. If working or spending time outdoors, wear UV protective clothing, use sunscreen, and try to avoid direct sun exposure between 11 AM and 4 PM.
TodayTomorrow
ExtremeVery highHighModerateLow
12PM
5PM
9PM
1AM
5AM
LowModerateHighVery high
Hourly UV and cloud cover
UV index is unitless. Cloud cover is shown as a percentage.
HourUV indexCloud cover
2PM1Low6%
3PM2Low5%
4PM4Moderate5%
5PM6High5%
6PM8Very high8%
7PM9Very high14%
8PM9Very high25%
9PM10Very high37%
10PM8Very high50%
11PM5Moderate59%
12AM3Moderate66%
1AM2Low65%
2AM1Low61%
3AM0Low55%
4AM0Low44%
5AM0Low33%