Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Adamantina, Brazil, where the climate typically features warm temperatures and plenty of sunshine. Awareness of UV levels is vital for preventing sunburn and protecting skin health, especially during peak hours when the index can reach as high as 8 around noon and early afternoon. With such significant UV exposure risks, staying informed about daily UV fluctuations allows you to enjoy the sun responsibly while safeguarding your skin from potential damage in this vibrant city.
The UV Index for the day exhibits a notable increase as the sun rises, peaking between 12:00 PM and 1:00 PM with a maximum value of 8, indicating that sunscreen and protective measures are highly recommended. The morning starts off mild, with values of 1 at 7 AM and 8 AM, gradually climbing to 2 by 9 AM. As the clock strikes 10 AM, the index rises to 4, marking the onset of higher UV exposure, which continues to escalate to 6 at 11 AM before hitting the peak. After 1 PM, the UV levels drop swiftly, falling to 6 at 2 PM, and declining further to 4 by 3 PM. The evening brings relief as the index dwindles to 2 at 4 PM, and finally settles at 1 by 5 PM, leading to a 0 rating at 6 PM and beyond. It's a day where staying sun-smart is vital around midday, but the evening promises a gentler UV presence.
| 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 | 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 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit significant seasonal changes, with extreme values predominantly observed from January to April and a resurgence in September to November. The highest risk months are January, February, and December, where the UV Index peaks at 15-16, indicating an extreme exposure category and a minimal burn time of just 10 minutes. As summer approaches, while the UV Index decreases to a peak of 10 in August, visitors and residents should remain vigilant, particularly in the months of March and April where the index remains high at 11-13. It is essential for everyone to adopt sun safety measures, including using broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak hours, especially during these high-risk months.
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 |
| Adamantina | 15 | 15 | 13 | 11 | 8 | 7 | 8 | 10 | 12 | 14 | 14 | 16 |
| 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 |