Last updated: July 2, 2025
Understanding the UV Index is essential for residents and visitors of Gurupi, Brazil, where exposure to harmful ultraviolet rays can lead to sunburn and long-term skin health issues. With a tropical climate and high UV levels peaking at 10 around midday, awareness of these daily fluctuations is crucial for effective sun protection. By keeping an eye on the UV Index, you can enjoy the sunny days while safeguarding your skin from potential damage, ensuring your outdoor activities remain fun and safe. Remember, even when the UV Index is lower, it's important to stay vigilant and protect yourself against skin risks associated with prolonged sun exposure.
As the sun rises, the UV Index begins its gradual climb, starting at a mere 1 at 7:00 AM. By 8:00 AM, it doubles to 2, hinting at the promise of a brighter day. The index reaches 4 at 9:00 AM, marking the start of a moderate risk for sun exposure. By 10:00 AM, it escalates to 6, prompting outdoor enthusiasts to take precautions. The zenith arrives at 12:00 PM and 1:00 PM, where the index peaks at an intense 10—a clear signal to seek shade and apply sunscreen! Although it dips to 8 at 2:00 PM, the threat remains, before gradually declining to 5 at 3:00 PM and then dropping further to 2 at 4:00 PM. As the day winds down, the UV Index falls to 1 by 5:00 PM and returns to 0 by 6:00 PM, echoing the day's safe closure. With a day full of varied UV exposure, it's crucial to stay sun-smart during those peak hours!
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 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 |
Throughout the year, UV index levels vary significantly, with extreme exposure and very high risk months particularly evident from January to April, having UV indices consistently above 13. The highest levels occur in January and November, both at UV Index 16. Other high-risk months include February through October, where the index remains at least 11, prompting extreme exposure categories. June and July hold a slightly lower risk with a UV Index of 10 in the very high category, with longer burn times of 15 minutes. As a result, it is crucial for both visitors and residents to take protective measures, especially in high-risk months, by wearing sunscreen, protective clothing, and seeking shade when outdoors. Remember: during any month reaching an index of 11 or above, stay vigilant and minimize sun exposure to avoid 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 |
| 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 |
| Gurupi | 16 | 15 | 15 | 13 | 11 | 10 | 10 | 12 | 13 | 14 | 16 | 15 |