Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Araguaina, Brazil, where the hot, tropical climate (Aw) can lead to intense sun exposure. With UV levels peaking during midday—reaching a staggering 11—awareness of these fluctuations is essential for preventing sunburn and maintaining overall skin health. This knowledge empowers individuals to take protective measures, especially when outdoor activities are on the agenda. In Araguaina, where sunny days are abundant, keeping an eye on the UV Index not only safeguards your skin but also enhances your enjoyment of the beautiful weather the region has to offer.
The UV Index throughout the day showcases a dynamic pattern, peaking sharply during midday hours. At 07:00, the index starts low at 1, indicating minimal risk. As the sun rises, it climbs to 2 at 08:00 and rapidly escalates to 4 by 09:00. By 10:00, the intensity reaches 7, but the real intensity hits at 12:00 with a maximum of 11, signifying a high risk of harm from unprotected sun exposure. Though it dips slightly to 10 at 13:00, the index begins to retreat, dropping to 8 at 14:00, followed by a more gradual decrease to 5 at 15:00. As the sun sets, the index falls to 3 by 16:00, and then drops to 1 by 17:00, settling at a low 0 by 19:00. This data serves as a vital reminder for sun safety, especially during peak hours!
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index data showcases consistently extreme UV levels throughout the year, with January to March maintaining peak values of 15, presenting a high-risk period for sun exposure. Notably, all months feature a burn time of just 10 minutes, emphasizing the urgency for protective measures. As we transition from April through June, the index slightly decreases to 14 and 12, yet still warrants caution as these months also carry extreme exposure categories. Visitor and resident advisories are critical: it is essential to employ broad-spectrum sunscreen, wear protective clothing, and seek shade, especially during these high-risk months. Remember, even on cloudy days, UV rays can penetrate and cause skin damage, so vigilance should be maintained year-round.
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 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |
| Araguaina | 15 | 15 | 15 | 14 | 12 | 11 | 11 | 12 | 13 | 13 | 14 | 14 |