Last updated: July 2, 2025
In Petrolina de Goiás, understanding the UV Index is crucial for protecting your skin and overall health. With its Aw climate, characterized by warm temperatures and plentiful sunshine, the region experiences significant UV exposure, particularly from 10 AM to 2 PM when levels can soar to 10—a strong indication of potential harm. By being aware of the UV levels, residents and visitors can take essential precautions to prevent sunburn and promote long-term skin health, ensuring enjoyable outdoor experiences while safeguarding against the sun's harsh effects.
The UV Index reveals a dynamic day of sun exposure, starting off gently with a low of 1 at 7:00 AM and 8:00 AM. As the sun climbs higher, the index begins to rise sharply, peaking at 10 by noon, signaling ideal conditions for outdoor activities—though caution is advised. The intensity remains high as it slightly dips to 9 at 1:00 PM and 7 at 2:00 PM, before tapering off in the afternoon. By 4:00 PM, the index drops to 2, and the sun’s intensity continues to fade, reaching 0 by 6:00 PM. This hourly trend underscores the importance of sun safety during peak hours, particularly from 10:00 AM to 2:00 PM, when protection is most crucial.
| 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | 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 experiences seasonal fluctuations, with the highest levels occurring in the winter and early spring months. January through April consistently show extreme values, ranging from 16 to 14, indicating a burn time of just 10 minutes. As temperatures rise, May and June drop slightly to very high levels of 10 and 9 respectively, allowing for a marginally increased burn time of 15 minutes. July continues with a very high index at 10, then shifts back to extreme levels in August and September, with values of 12 and 13. The trend remains high into October and November, before dipping to 16 in December. Given these patterns, visitors and residents are advised to take precautions during high-risk months, particularly in the winter and early spring, by using sun protection measures such as sunscreen, hats, and protective clothing, and to remain cautious even in months classified as very high. Always be aware of the UV Index for the day and limit direct sun exposure accordingly.
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 |
| 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 |
| Petrolina de Goias | 16 | 16 | 14 | 13 | 10 | 9 | 10 | 12 | 13 | 15 | 15 | 16 |