Last updated: May 3, 2025
Being aware of the UV Index in San Francisco de Borja, Mexico is crucial for safeguarding your skin and overall health. With the region's BSk climate, which includes dry summers and mild winters, residents and visitors can experience significant UV exposure, particularly during the midday hours. Understanding these UV levels is essential to prevent sunburn and reduce the risk of long-term skin damage. Peak UV Index readings in San Francisco de Borja can soar as high as 14 around noon, underscoring the importance of proactive sun protection measures. Stay informed and enjoy the sun safely!
The UV Index for the day showcases a dramatic rise in intensity as the sun climbs higher in the sky. Starting at a gentle 1 at 07:00, the index escalates rapidly, reaching 4 by 09:00. The peak occurs at 13:00 with a scorching 14, making it crucial for sun safety during these hours. As the afternoon progresses, the UV levels start to decline, with a notable drop to 10 by 15:00 and further to 2 by 18:00. This gradual fade into the evening brings the UV index back down to 1 by 19:00, marking a day where protection against the sun is essential from late morning to early afternoon.
| 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 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 13 | 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 |
The UV Index shows significant seasonal changes, peaking during the spring and summer months. From January (UV Index 7) to March (UV Index 11), there is a gradual increase in UV intensity, reaching an extreme level of 14 in both April and May. The high-risk months for UV exposure are February through September, where the UV Index consistently remains at 9 or above, necessitating protective measures. Visitors and residents are advised to limit sun exposure, particularly during peak hours, and to utilize sun protection strategies, such as wearing sunscreen, hats, and protective clothing, especially when burn times drop to as low as 10 minutes during the most intense months. As the year progresses, UV levels decrease, with a notable drop to UV Index 6 in December, providing a more manageable risk through the winter months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| San Francisco de Borja | 7 | 9 | 11 | 14 | 14 | 13 | 13 | 13 | 13 | 10 | 8 | 6 |
| Guadalajara UVI | 9 | 11 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 9 | 8 |
| Iztapalapa UVI | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |
| Ecatepec de Morelos UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Mexico City UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |