UV index today in Thornton, 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
1PM
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%
3PM2Low6%
4PM4Moderate5%
5PM6High5%
6PM8Very high6%
7PM9Very high7%
8PM9Very high11%
9PM10Very high18%
10PM8Very high33%
11PM5Moderate50%
12AM3Moderate58%
1AM2Low54%
2AM1Low51%
3AM0Low46%
4AM0Low37%
5AM0Low30%