Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Tiradentes, Brazil, where the warm Cwa climate brings an abundance of sunshine. With UV levels peaking at 7 between 11:00 AM and 1:00 PM, awareness of these daily fluctuations is key to preventing sunburn and promoting long-term skin health. As the sun’s intensity can quickly rise, particularly during mid-day, being informed about UV exposure not only protects your skin but also enhances your outdoor experiences in this charming, historic town. Stay smart, stay safe, and enjoy all that Tiradentes has to offer while keeping your skin healthy!
The UV Index for the day provides a clear picture of sun exposure. Starting off gently at 1 in the early hours, the intensity gradually builds, reaching a peak of 7 between 11:00 and 12:00. This is the ideal time for sun protection, as skin can burn quickly. As the afternoon progresses, the index declines, dropping to 3 by 15:00 and further down to 1 by late afternoon. After sunset, the UV Index falls to 0, indicating safe conditions. Stay sun smart, especially during the peak hours for maximum protection!
| 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 | 7 | high | 25 min |
| 13:00 | 6 | 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 fluctuations, with the highest levels occurring from January to April, reaching an extreme peak of 17 in January, and remaining at 16 through February. March and April follow closely, both categorized as extreme, with a UV Index of 14 and 12, respectively. May marks a slight decrease to 9, transitioning to a very high exposure category. As summer approaches, June sees a further decline to a 7 (high), while July and August maintain a very high risk with indices of 8 and 10, respectively. The UV risk escalates again in September to 13, falling back to extreme levels of 14 in October and November, before ending the year with a 16 in December. Visitors and residents should take extra precautions during the high-risk months of January through April and September through November, when burn times are as low as 10 minutes. It is advised to wear protective clothing, apply sunscreen regularly, and seek shade to minimize UV exposure during these periods.
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 |
| Tiradentes | 17 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 13 | 14 | 14 | 16 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |