Last updated: June 2, 2025
In Boa Esperança, Brazil, understanding the UV Index is essential for safeguarding your skin and overall health. As a tropical location characterized by its Aw climate, residents and visitors alike face elevated UV exposure risks, especially during midday hours. With UV levels peaking at 8 between 12 PM and 1 PM, awareness of these fluctuations is crucial for sunburn prevention and long-term skin health. By keeping an eye on the UV Index, you can enjoy the beautiful Brazilian sun while taking the necessary precautions to protect your skin from harmful ultraviolet rays.
The UV Index throughout the day reveals a fascinating curve of sun exposure. Starting early, at 7:00 AM, it registers a low of 1, gradually climbing to its peak of 8 around noon. This notable surge underscores the importance of sun protection, especially from 11:00 AM to 1:00 PM, when the index reaches 7 and 8, respectively. As the afternoon progresses, the UV Index begins to decline, dipping to 4 by 2:00 PM and further down to 1 by 5:00 PM. By the time the sun sets, the UV Index drops to 0, indicating a safe window to enjoy the cooler evening hours without the risk of harmful sun exposure. Remember, during the peak times, sunscreen and protective clothing are vital for your safety!
| 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 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 6 | high | 25 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 seasonal UV changes reveal a consistent trend of extreme UV exposure from January through April, with indices peaking at 15 and a burn time of just 10 minutes. Following this, the UV Index decreases slightly in May and June, registering at 9 and 8 respectively, while still maintaining a very high exposure category with a burn time of 15 minutes. From August onwards, UV levels shift back to extreme values, reaching 11 in August and 12 in September and October, before returning to extremes through November and December. The high-risk months for sun exposure are therefore January to April and August to November, with a particular emphasis on the beginning and end of the year. Visitors and residents are strongly advised to take precautionary measures during these months, such as wearing protective clothing, applying sunscreen frequently, and limiting sun exposure, especially during peak hours, to mitigate 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 |
| Boa Esperanca | 15 | 15 | 14 | 12 | 9 | 8 | 8 | 11 | 12 | 14 | 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 |