UV index tomorrow in Ontario, CA
UV Index
Moderate
This day's UV index is moderate. Using sunscreen or other UV protection is recommended. Try to avoid direct sun exposure between 11 AM and 4 PM.
Wed24 hours
ExtremeVery highHighModerateLow
12AM
4AM
8AM
12PM
4PM
8PM
11PM
LowModerate
Hourly UV and cloud cover
UV index is unitless. Cloud cover is shown as a percentage.
HourUV indexCloud cover
7AM0Low82%
8AM0Low85%
9AM0Low83%
10AM0Low83%
11AM0Low83%
12PM0Low85%
1PM0Low87%
2PM0Low88%
3PM1Low90%
4PM2Low90%
5PM2Low91%
6PM3Moderate86%
7PM4Moderate82%
8PM4Moderate84%
9PM4Moderate81%
10PM3Moderate75%
11PM3Moderate66%
12AM2Low59%
1AM1Low57%
2AM1Low54%
3AM0Low52%
4AM0Low53%
5AM0Low54%
6AM0Low54%