Last updated: June 2, 2025
In Blumenau, Brazil, being aware of the UV Index is essential for protecting your skin and overall health. Understanding UV levels is crucial, as it helps you prevent sunburn and reduce the risk of long-term skin damage. With a Cfa climate that features warm summers and significant sun exposure, Blumenau residents should pay extra attention to UV readings, especially during peak hours when the index can reach up to 6. By staying informed and taking precautions, you can enjoy the sunny days while safeguarding your skin's health.
The UV Index today showcased a notable increase from the early morning hours, starting at a gentle 1 at 07:00 and 08:00. As the sun rose higher in the sky, the index climbed steadily, reaching a significant 6 by 12:00, indicating a peak in UV radiation and the need for sun protection. The afternoon saw a slight decline, with values dropping to 4 at 14:00 and falling further to 2 by 15:00. As the day wound down, the UV index returned to a safer range, ending the day at 0 by 19:00. It’s crucial to stay informed and safeguard your skin during those high UV hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 2 | low | 45 min |
| 16:00 | 1 | 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 significant fluctuations throughout the year, with the highest levels occurring during the winter months of January, February, and March, where it reaches an extreme rating of 15 and a quick burn time of just 10 minutes. As the seasons change, April sees a slight decrease to 10 (very high), while May and June drop further to 7 and 6, both categorized as high, allowing for longer exposure times of 25 minutes. However, August sees an uptick to 8, returning to a very high level, before reverting to extreme conditions again in September (UV Index 11) and October (13). November and December mirror the start of the year with extreme values of 14 and 15, respectively. Visitors and residents alike should be particularly cautious during high-risk months (January, February, March, September, October, November, and December), limiting sun exposure to prevent harmful effects. Utilizing protective clothing, sunglasses, and sunscreen is strongly advised, especially during peak UV hours to maintain skin health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blumenau | 15 | 14 | 12 | 10 | 7 | 6 | 6 | 8 | 11 | 13 | 14 | 15 |
| 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 |