Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Mauá, Brazil, especially in a region characterized by a Cfa climate, which often leads to intense sunlight and higher UV exposure risks. Being aware of daily UV levels helps you take proactive measures to prevent sunburn and protect your skin health. With peak UV values reaching 8 around midday, it's essential to check the UV Index to plan outdoor activities smartly and safeguard yourself from potential skin damage. By prioritizing UV awareness, you can enjoy all that Mauá has to offer while protecting your well-being under the sun.
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00. By 08:00, it gently climbs to 2, but it's not until 09:00 that it hits 3, signaling a clearer sky. The index takes a notable leap at 10:00, reaching a brisk 5, and peaks at 12:00 with a striking 8—the ideal time to seek shade or apply sunscreen! As the afternoon wears on, the index falls back to 7 at 13:00, and then gradually drops to 5 by 14:00. As the sun starts to set, there's a further decline, leaving the evening with a relaxed 1 at 16:00 and tapering off to 0 by 19:00. This detailed hour-by-hour progression highlights the importance of sun safety during the peak hours of the day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 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 exhibits significant seasonal changes, peaking between January and April with extreme levels ranging from 15 to 16, which translates to a rapid burn time of just 10 minutes. Following this intense period, May marks a decrease to a very high index of 8, with a slightly longer burn time of 15 minutes. From June to July, the UV exposure remains high, with indices of 6 to 7, allowing for up to 25 minutes of safe sun exposure. As summer fades, August sees a rise again to a very high index of 9, followed by a return to extreme levels in September and throughout the fall months into December, where the index consistently hovers around 14 to 15 with a 10-minute burn time. Consequently, the highest risk months for UV exposure are from January to April and September to November. Visitors and residents are strongly advised to take necessary precautions during these periods, such as using sunscreen, wearing protective clothing, and seeking shade to minimize the risk of sunburn and long-term 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 |
| Maua | 16 | 15 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 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 |