Last updated: July 2, 2025
Understanding the UV Index is crucial for the residents of João Neiva, Brazil, where the tropical climate can lead to high sun exposure. Knowing the daily UV levels empowers you to take proactive measures against sunburn and long-term skin damage. With UV readings peaking at 8 around noon, it's essential to plan your outdoor activities wisely to minimize risks. By staying informed, you can enjoy the vibrant Brazilian sunshine while keeping your skin health in check amidst the typical heat of this Aw climate zone.
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it nudges up to 2, signaling a mild increase in UV exposure. The intensity heats up quickly, reaching a moderate 4 by 9:00 AM, before hitting its peak of 8 from 11:00 AM to 12:00 PM. This is the prime time for sun safety awareness! After noon, the UV Index gradually declines; by 3:00 PM, it recedes to 3, and as the day wanes, it drops significantly to 1 by 4:00 PM. By evening, UV levels have diminished, reaching 0 by 6:00 PM, offering a reprieve from the sun’s rays.
| 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 | 8 | very high | 15 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 |
Throughout the year, the UV Index reveals significant seasonal variations, particularly peaking in the winter and late fall months. From January to November, the UV Index consistently reaches extreme levels, often hitting 15, with a burn time as short as 10 minutes in these high-risk months. March and April see slightly lower values (UV index of 14 and 12, respectively), yet still remain in the extreme range. As we transition into May and June, the UV Index drops slightly to levels categorized as very high and high, allowing for somewhat increased burn times. However, July and August shift back to very high ratings, reinforcing the need for vigilance. In September and October, the UV Index once again peaks at extreme levels, with a return to the 10-minute burn time typical of the winter months. November maintains this extreme categorization, rounding out the year with similar risks. Visitors and residents are strongly advised to take precautions by wearing protective clothing, using high-SPF sunscreen, and limiting sun exposure during peak hours, particularly from November to April when the risks are at their highest.
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 |
| Joao Neiva | 15 | 15 | 14 | 12 | 9 | 7 | 8 | 10 | 11 | 13 | 15 | 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 |