Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Santa Clara, as it plays a vital role in protecting skin health and preventing sunburn. With a climate classified as BSk, Santa Clara experiences varying levels of UV exposure, peaking around midday when the UV Index can reach a high of 12. Being aware of these UV levels not only helps individuals make informed decisions about sun protection but also fosters a broader awareness of long-term skin health. As the sun's intensity increases throughout the day, residents can ensure safe sun practices to enjoy the beautiful California weather while minimizing the risks associated with UV radiation.
The UV Index starts off gentle in the early hours, peaking at 1 at 07:00 and remaining low at 08:00. As the sun climbs higher, the intensity increases, reaching 3 by 09:00 and hitting a more noticeable 5 at 10:00. The midday sun becomes increasingly fierce, soaring to 8 by 11:00, then reaching its blistering maximum of 12 at 12:00 and 13:00. Even as the afternoon unfolds, the UV Index remains high at 11 and 12 until 15:00, before gradually tapering off to 8 at 16:00. As dusk approaches, the levels decline, settling back to 3 by 18:00 and returning to a safe 1 by 19:00. It's vital to protect your skin during those peak hours, especially between 11:00 and 15:00!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 1 | low | 45 min |
09:00 | 3 | moderate | 30 min |
10:00 | 5 | moderate | 30 min |
11:00 | 8 | very high | 15 min |
12:00 | 11 | extreme | 10 min |
13:00 | 12 | extreme | 10 min |
14:00 | 12 | extreme | 10 min |
15:00 | 11 | extreme | 10 min |
16:00 | 8 | very high | 15 min |
17:00 | 5 | moderate | 30 min |
18:00 | 3 | moderate | 30 min |
19:00 | 1 | low | 45 min |
Throughout the year, the UV Index displays significant seasonal variations. The high-risk months, characterized by extreme UV levels and minimal burn times, are May through August, with June and July reaching a peak UV Index of 12 and an urgent burn time of just 10 minutes. As spring transitions to summer, the UV Index escalates from a moderate level of 4 in January to an extreme of 11 in May, then gradually declines again in fall and winter. Visitors and residents are advised to take precautions during these high-risk months, such as seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen to minimize the risks of skin damage from UV exposure. In contrast, during the moderate months of November and December, exposure is less critical, but protective measures are still recommended. Stay informed and protect your skin year-round!
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 |
Santa Clara | 4 | 6 | 8 | 10 | 11 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |