Last updated: May 3, 2025
In Terra Boa, Brazil, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding the daily UV levels is essential for residents and visitors alike, especially during peak hours when the UV Index can skyrocket. With a Cfa climate, Terra Boa experiences warm temperatures and significant sun exposure, particularly between 10 AM and 2 PM when UV levels reach as high as 8. By staying informed about the UV Index, you can take proactive steps to protect your skin, ensuring that your time under the Brazilian sun remains enjoyable and safe.
As the day breaks, the UV Index gradually rises, peaking at a robust 8 at 12:00 PM, signaling the sun's intensity is at its highest. Starting from a mild 1 at 07:00 AM and 08:00 AM, the UV levels steadily climb, hitting 5 by 10:00 AM. By 11:00 AM, a brisk 7 indicates that sun safety measures are essential. The intensity slightly declines after noon, tapering off to 6 at 2:00 PM, and then gradually decreases to a 4 by 3:00 PM. By evening, the UV Index drops back to a mere 1 at 5:00 PM and ultimately falls to 0 after 6:00 PM, signaling a safe return home as the sun sets. Keep this UV pattern in mind for outdoor activities to protect your skin and enjoy the day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | 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 | 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 |
Throughout the year, the UV Index experiences significant seasonal changes, with the highest levels seen from January to April, where it consistently falls within the extreme exposure category (UV Index values of 15 to 13). May marks a slight decrease to a very high category (UV Index 8), leading into a relatively lower high category during June and July (UV Index 6 to 7), before rising again in August with another very high rating. As summer turns to fall, September sees a jump back to extreme levels, similar to the winter months of October, November, and December. Visitors and residents should be especially cautious and limit their sun exposure from November through April and in September, as these months highlight peaks in the extreme UV Index category with a burn time of just 10 minutes. It is advisable to wear protective clothing, use sunscreen, and seek shade during these high-risk periods to ensure 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 |
| Terra Boa | 15 | 14 | 13 | 11 | 8 | 6 | 7 | 9 | 11 | 14 | 15 | 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 |