Last updated: July 2, 2025
Understanding the UV Index in San Manuel, United States, is crucial for protecting your skin and overall health. With peak levels soaring as high as 12, awareness of UV intensity can help residents and visitors alike prevent sunburn and reduce long-term skin damage. San Manuel experiences a BSk climate, characterized by dry, sunny days that amplify UV exposure risks, particularly during midday hours. By staying informed about daily UV levels, you can enjoy the outdoors safely while safeguarding your skin.
The UV Index throughout the day exhibits a striking pattern, peaking at an intense 12 between 12:00 PM and 1:00 PM, marking it as a crucial time for sun protection. As the sun rises, the index climbs steadily from a mild 1 at 7:00 AM to a moderate 3 by 8:00 AM. It reaches 6 by 9:00 AM and escalates further to 8 at 10:00 AM. The midday sun asserts its strength with a 11 at 11:00 AM before hitting the maximum at 12. Following this peak, the UV Index begins its gradual decline, dropping to 10 at 2:00 PM, then falling to 7 by 3:00 PM. The later hours see a further reduction, with values slipping to 5 by 4:00 PM and tapering off to 1 again by 6:00 PM. Stay sun-safe during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal UV changes show a significant increase in ultraviolet radiation from late winter through summer, peaking during the months of March to October. The high-risk months are primarily from March to September, where the UV Index reaches very high to extreme levels, with burn times dropping to as low as 10 minutes. As such, it is crucial for visitors and residents alike to take preventative measures during these times, including wearing broad-spectrum sunscreen, protective clothing, and seeking shade, especially during peak hours from 10 AM to 4 PM. In contrast, January, February, October, and November present a lower risk, but vigilance is still advised as exposure can still lead to skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chicago UVI | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Brooklyn UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| New York City UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| Los Angeles UVI | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
| San Manuel | 5 | 7 | 10 | 11 | 12 | 13 | 12 | 11 | 11 | 8 | 6 | 5 |