Last updated: July 2, 2025
Being aware of the UV Index is crucial for residents and visitors of San Felipe, United States, particularly given its Cfa climate that often brings ample sunshine. Understanding the daily UV levels can mean the difference between enjoying the outdoors and suffering from painful sunburns or long-term skin damage. With peak UV Index readings reaching 11 during midday hours, it's imperative to take precautions to protect your skin. By staying informed about UV exposure risks, you can better enjoy San Felipe's beautiful sunny days while ensuring your skin remains healthy and safe.
The UV Index for the day showcases a dramatic increase in intensity as the sun climbs higher in the sky. Starting at a mild 1 at 07:00, it remains low throughout the morning, only reaching 3 by 09:00. However, by 11:00, the index skyrockets to 8, peaking at an intense 11 from 13:00 to 14:00. As the afternoon wanes, the UV levels gradually decrease, dropping to 4 by 17:00 and tapering off to 1 once again by 19:00. It's clear that midday hours pose the greatest risk for sun exposure, making it crucial to take precautions during the peak hours from 11:00 to 14:00.
| 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 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal variations in UV exposure present important considerations for both visitors and residents. From January to March, UV levels gradually increase, with February and March categorized as very high, requiring 15 minutes for potential skin damage. The peak months occur from April to August, where the UV Index reaches extreme levels (up to 12), demanding heightened caution and limiting unprotected exposure to 10 minutes. In September and October, the index remains in the very high category, allowing for 15 minutes of exposure before burns may occur. Later in the year, November sees a decrease to a high level (UV Index 7) with a burn time of 25 minutes, while December returns to a moderate level (UV Index 5, burn time of 30 minutes). To protect against harmful UV radiation, it is crucial for everyone to apply sunscreen generously, wear protective clothing, and seek shade during the most intense sun hours, especially from April to August.
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 |
| San Felipe | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 12 | 10 | 9 | 7 | 5 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |