Last updated: June 2, 2025
Understanding the UV Index in Los Angeles is crucial for anyone looking to enjoy the sun while prioritizing their skin health. The UV Index measures the strength of ultraviolet radiation from the sun, helping residents and visitors alike to gauge their risk of sunburn and long-term skin damage. With Los Angeles' typically sunny climate and high UV exposure, particularly between 10 AM and 2 PM when the index peaks, being aware of these levels can guide you in taking necessary precautions. Awareness of the UV Index empowers you to enjoy the outdoors safely, ensuring you protect your skin while still soaking up those beautiful California rays.
As the sun rises, the UV Index (UVI) begins at a mild 1 at 7:00 AM, gradually climbing to 2 by 8:00 AM. Things heat up significantly by 9:00 AM, reaching a 5, but the real intensity kicks in as the clock strikes 10:00 AM, soaring to a striking 9. The peak of the day arrives around 12:00 PM, where it reaches a blistering 13, sustained until 1:00 PM. After this peak, the UVI starts to decline steadily, dropping to an 8 by 3:00 PM, and then tapering off to calmer levels: 4 at 4:00 PM, 2 by 5:00 PM, and finally winding down to just 1 at 6:00 PM. By 7:00 PM, the UV threat vanishes entirely, settling at 0. This dynamic timeline reminds us to protect our skin during the midday hours when UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains extremely high, with values peaking at 15 in April and experiencing little fluctuation between 12 and 14 from January to October. The high-risk months appear to be from March to October, during which the UV Index consistently maintains a level that requires serious sun protection measures, as the recommended burn time is just 10 minutes across all months. Visitors and residents are strongly advised to wear protective clothing, apply broad-spectrum sunscreen regularly, and seek shade when outdoors, particularly during these months, to reduce the risk of harmful skin exposure to UV radiation. Regular monitoring of UV index levels is also recommended when planning outdoor activities.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arraijan UVI | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 13 | 13 | 11 | 10 |
| Juan Diaz UVI | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 13 | 13 | 11 | 10 |
| San Miguelito UVI | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 13 | 13 | 11 | 10 |
| Panama UVI | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 13 | 13 | 11 | 10 |
| Los Angeles | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 14 | 14 | 12 | 11 |
| David UVI | 12 | 13 | 14 | 15 | 14 | 13 | 14 | 13 | 14 | 14 | 12 | 11 |