Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors in Sao Manuel, Brazil, as it provides essential information about potential sun exposure risks throughout the day. With a climate characterized by warm summers and mild winters, Sao Manuel experiences varying UV levels that can lead to sunburn and long-term skin damage if not properly managed. From maximum UV indices reaching up to 7 during midday, it’s vital to stay informed about these fluctuations to protect your skin and overall health. By being aware of the UV index, you can enjoy the sunny days while minimizing risks associated with high UV exposure.
Today's UV Index shows a dynamic rise and fall in intensity throughout the day. Starting with a gentle 1 at 07:00, it gradually increases to a moderate 3 by 09:00. The sun reaches its zenith at 12:00, where the UV Index peaks at a striking 7, recommending caution for those outdoors. The intensity remains high at 7 till 13:00 before gracefully tapering off to 5 by 14:00. As the afternoon wanes, the UV Index declines to 3 at 15:00 and further drops to 1 by 17:00, finally settling at 0 after 18:00. Enjoy the sun, but remember to stay protected during the 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 | 9 | very high | 15 min |
| 14:00 | 7 | 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 |
The UV Index exhibits significant seasonal changes, with the highest levels typically occurring during the winter and early spring months. From January to March, the UV Index remains in the extreme category (15-13), indicating a burn time of just 10 minutes. This pattern continues into April (UV Index 11) before declining in May to a very high level (UV Index 8) with a burn time of 15 minutes. June and July see a slight reduction to a high level (UV Index 7) allowing for a longer burn time of 25 minutes. However, the UV levels spike again in August (UV Index 10) before sharply rising in September to extreme (UV Index 12), while October and November maintain extreme levels (UV Index 13-14). December reaches its peak at a UV Index of 16, still classified as extreme. Visitors and residents should take extra precautions during high-risk months—especially from January to April and September to November—by applying sunscreen, wearing protective clothing, and minimizing sun exposure during peak hours to reduce the risk of UV-related harm.
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 |
| Sao Manuel | 15 | 15 | 13 | 11 | 8 | 7 | 7 | 10 | 12 | 13 | 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 |