Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Janauba, Brazil, where the sun can be both invigorating and intense. As a city situated in a tropical climate, Janauba experiences high UV levels that can pose significant risks to skin health, including sunburn and long-term damage. By being aware of UV levels throughout the day, especially during peak hours when the index can soar to 10, individuals can take proactive measures to protect themselves, ensuring that outdoor activities are both enjoyable and safe. Embrace the sun wisely to maintain healthy skin and enhance your time in this vibrant region!
As the sun rises, the UV Index begins its climb, starting at a modest 1 at 07:00. By 08:00, it gently increases to 2, signaling a day of strengthening rays. The intensity peaks around 12:00 with a striking 10, indicating the time for caution and sun protection. As midday passes, the index gradually declines, dropping to 6 at 14:00 before continuing its descent to 4 at 15:00. By 17:00, it returns to a safer 1, and eventually fades to 0 after 18:00, marking a gentle close to the day. This data underscores the importance of seeking shade and wearing sunscreen during the midday hours when the UV exposure is at its most intense.
| 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 | 7 | 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 | 6 | 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 variations, with the highest readings occurring during the winter and late fall months. **From January to April, the UV Index remains consistently extreme, peaking at 16 in December and dropping slightly to 13 in April. The risk is particularly acute in February (UV Index 15) and November (UV Index 15), necessitating vigilant sun protection. As summer arrives, the index slightly declines, with June and July recording a very high index of 9 and 10, respectively, allowing for a longer burn time of 15 minutes. However, as fall sets in, August and September return to extreme levels (12), before transitioning back to winter’s extremes. Visitors and residents should take precautions during high-risk months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially during peak sun hours. Given the consistently high UV levels year-round, staying aware and prepared is essential for skin safety.
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 |
| Janauba | 15 | 15 | 14 | 13 | 11 | 9 | 10 | 12 | 12 | 14 | 15 | 16 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |