Last updated: July 2, 2025
Understanding the UV Index in Altinopolis, Brazil is essential for safeguarding your skin and overall health. With rising UV levels, especially during midday hours, being aware of these indices helps in preventing sunburn and reducing the risk of long-term skin damage. Altinopolis, located in a humid subtropical climate (Cwa), experiences significant UV exposure, particularly between 10 AM and 3 PM, where the index can soar to as high as 8. By staying informed about the UV Index, residents and visitors can take proactive steps to enjoy the sun safely while protecting their skin.
At dawn, the UV Index remains low, peaking at 1 by 08:00. As the sun rises higher, a notable increase occurs, reaching 3 at 09:00 and escalating dramatically to a maximum of 8 from 12:00 to 13:00. This midday surge indicates a higher risk for sun exposure, making it essential to take precautions such as wearing sunscreen and protective clothing. The intensity then gradually declines, dropping to 4 by 15:00, and continuing its descent to 0 by 19:00, marking the end of the sun’s peak influence for the day. Stay mindful of these hourly fluctuations to enjoy the sun safely!
| 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 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | 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 |
During the year, the UV Index fluctuates significantly, with the highest levels occurring in the winter and early spring months. Notably, January, February, and March exhibit an extreme UV Index of 16, necessitating a burn time of just 10 minutes for unprotected skin. Following this, April sees a slight decrease with an index of 12. The risk remains very high in May and July, with indices of 9 and 8, respectively. However, August also maintains a very high risk at 10, while September returns to an extreme level of 12. Consequently, October and November see an extreme index of 14, before winter resumes with December's extreme 16. Visitors and residents should exercise extreme caution and take appropriate sun protection measures, especially from January through April and again in September to November, as these are high-risk months for UV exposure. Always wear sunscreen, hats, and protective clothing, and limit sun exposure during peak hours to safeguard against skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rio de Janeiro UVI | 15 | 14 | 13 | 10 | 7 | 6 | 7 | 9 | 11 | 12 | 13 | 15 |
| Sao Paulo UVI | 16 | 15 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 15 |
| Belo Horizonte UVI | 17 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 13 | 14 | 16 |
| Altinopolis | 16 | 16 | 13 | 12 | 9 | 7 | 8 | 10 | 12 | 14 | 14 | 16 |
| Salvador UVI | 14 | 14 | 14 | 13 | 10 | 9 | 9 | 12 | 12 | 15 | 15 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |