Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in San Borja, Bolivia, where the climate can lead to significant sun exposure risks. With high UV levels peaking around noon, awareness can help prevent sunburn and protect skin health, making it essential to check daily UV forecasts. As a city characterized by its warm, tropical climate, San Borja’s sunny days can contribute to increased UV radiation, especially during the midday hours when levels soar to 9. By keeping an eye on the UV Index, you can enjoy the sun safely and maintain healthy skin year-round.
Get ready for a sunny day as the UV Index climbs throughout the morning and peaks in the afternoon! Starting gently at a low level of 1 at 07:00 and 08:00, the intensity begins to rise steadily. By 09:00, it reaches 3, and things heat up significantly by 10:00 with a 5. The real sun-seeker moments hit between 11:00 and 13:00, where the UV Index soars to a maximum of 9, indicating a high risk of harm from unprotected sun exposure. As the day begins to wind down, the index gradually declines, dropping to 7 by 14:00 and falling further to 5 at 15:00. By the time evening arrives, the UV Index retreats to a low level of 1 at 17:00, finally fading to 0 after 18:00. Remember to lather on sunscreen and stay hydrated during those peak hours!
| 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 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | high | 25 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 data indicates a remarkably high risk of sun exposure throughout the year, with January to April showing an extreme exposure category and a consistent UV Index of 15, leading to a burn time of just 10 minutes. As late spring approaches, May sees a slight drop to 11, but still remains in the extreme range. June to August shift to a very high category, where burn times increase to 15 minutes; nevertheless, caution is still essential as UV levels remain elevated. September returns to extreme with a UV Index of 13, followed by another spike in October and November at 15. December caps the year with an index of 16, emphasizing the need for vigilance. Visitors and residents are advised to take precautions, including wearing sunscreen, protective clothing, and seeking shade during peak hours, particularly from January to April and in the fall months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santa Cruz de la Sierra UVI | 15 | 15 | 14 | 13 | 10 | 8 | 9 | 10 | 12 | 15 | 16 | 16 |
| San Borja | 15 | 15 | 15 | 14 | 11 | 9 | 9 | 10 | 13 | 15 | 15 | 16 |
| Sucre UVI | 17 | 17 | 16 | 14 | 11 | 9 | 10 | 12 | 15 | 17 | 17 | 18 |
| Sacaba UVI | 17 | 18 | 17 | 15 | 12 | 10 | 10 | 13 | 15 | 17 | 18 | 19 |
| Cochabamba UVI | 18 | 18 | 17 | 15 | 12 | 10 | 11 | 13 | 16 | 18 | 18 | 19 |
| Oruro UVI | 19 | 19 | 17 | 16 | 13 | 10 | 11 | 14 | 16 | 19 | 19 | 19 |