Last updated: May 3, 2025
In Rancho Santa Fe, understanding the UV Index is crucial for maintaining skin health and preventing sunburns, especially in a region known for its Mediterranean climate (Csa) characterized by long, sunny days. With UV levels peaking at a significant 11 during midday hours, residents and visitors alike must be proactive in protecting themselves from harmful ultraviolet rays. Being aware of the UV Index not only helps you plan outdoor activities safely but also ensures you take necessary precautions to safeguard your skin against damage. Whether you're enjoying a stroll or lounging by the pool, knowing the UV levels in Rancho Santa Fe is key to enjoying the sunshine responsibly.
The UV Index demonstrates a clear peak in intensity throughout the day, showcasing the need for sun protection during certain hours. Starting from a low of 1 at 07:00, the index rises steadily, reaching 4 by 09:00, before surging to a powerful 11 at midday. This intense level of UV radiation persists until 13:00, emphasizing the risk during these prime hours. As the afternoon progresses, the index gracefully declines, registering 9 at 14:00 and tapering off to a more moderate 3 by 17:00. By evening, it drops back to 1, signaling a safe window for outdoor activities as the sun sets. Be mindful of these fluctuations and stay protected during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest UV Index levels observed from March to August. The months of May and June peak at an extreme UV Index of 11 and 12, where the burn time drops to just 10 minutes, posing a significant risk for sunburn. March and April also present substantial risks, classified as very high with an Index of 9 and 10, and a burn time of 15 minutes. As summer wanes into autumn, the UV Index begins to decrease, but September and October still remain at high levels with burn times of 15 to 25 minutes. Therefore, visitors and residents are strongly advised to prioritize sun safety, especially during the high-risk months of March through August by wearing protective clothing, using sunscreen, and seeking shade during peak sun hours.
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 |
| Rancho Santa Fe | 4 | 6 | 9 | 10 | 11 | 12 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |