Last updated: July 2, 2025
Understanding the UV Index is crucial for the residents of San Mariano, Philippines, where the sun's rays can be both a source of joy and a concern for skin health. With a climate classified as Af, locals enjoy warm weather year-round but must remain vigilant about UV exposure, especially during peak hours when the index reaches as high as 14 around noon. Awareness of UV levels is essential not only for preventing sunburn but also for safeguarding against long-term skin damage. By keeping an eye on UV readings, you can better protect yourself and your loved ones from the hidden dangers of the sun while still enjoying the beautiful outdoor lifestyle that San Mariano has to offer.
The UV Index showcases a dramatic rise and fall throughout the day, offering insights into sun exposure. Starting at 7:00 AM with a mild index of 2, the sun's strength quickly escalates, peaking at 14 between 12:00 PM and 1:00 PM—the prime time for those seeking a tan or outdoor activity. At 10:00 AM, a noteworthy peak of 11 demands caution for sun-sensitive individuals. As afternoon approaches, the index decreases significantly, slipping to 5 at 3:00 PM, then further dropping to a mere 1 by 5:00 PM and fading to 0 after 6:00 PM. This data highlights the critical hours for protection against UV exposure, especially from 10 AM to 2 PM, where the sun is at its most intense.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 8 | very high | 15 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences extreme levels throughout the year, peaking in March with an index of 16. Notably, the months of February and April also reach a high of 15, while September and July closely follow with 14. Residents and visitors should be especially cautious from February to April, as these are the high-risk months for UV exposure, each requiring vigilance as the burn time is just 10 minutes across all months. It is advisable for everyone to apply broad-spectrum sunscreen, wear protective clothing, and seek shade whenever possible. Continuous awareness of UV exposure is essential year-round due to the consistently extreme exposure category.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Caloocan City UVI | 11 | 13 | 15 | 15 | 13 | 14 | 13 | 14 | 14 | 13 | 10 | 10 |
| Quezon City UVI | 11 | 13 | 15 | 15 | 13 | 14 | 13 | 14 | 14 | 13 | 10 | 10 |
| Manila UVI | 11 | 13 | 14 | 14 | 13 | 13 | 13 | 14 | 14 | 13 | 10 | 10 |
| Budta UVI | 13 | 15 | 16 | 16 | 14 | 13 | 14 | 14 | 15 | 14 | 13 | 11 |
| Davao UVI | 13 | 15 | 16 | 15 | 15 | 13 | 14 | 14 | 15 | 14 | 13 | 11 |
| San Mariano | 13 | 15 | 16 | 16 | 15 | 13 | 14 | 14 | 15 | 14 | 13 | 12 |