Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Urucui, Brazil, where the combination of a warm climate and high sun exposure can pose significant risks to skin health. As ultraviolet radiation can quickly lead to sunburn and long-term skin damage, being aware of daily UV levels allows individuals to take proactive measures to protect themselves. Typically, Urucui experiences elevated UV indexes throughout the day, especially peaking between 11:00 AM and 1:00 PM, when values soar to as high as 11. Staying informed about these fluctuations helps ensure that outdoor activities are enjoyed safely, fostering a culture of skin protection in this sun-drenched locale.
The UV Index begins its ascent at 07:00 with a low reading of 1, gradually rising to 2 by 08:00. As the day progresses, the intensity of UV radiation peaks at 12:00, hitting a maximum of 11—a critical level where sun protection is essential. Following this zenith, the index starts to decline, measuring 10 at 13:00, then tapering off to 8 by 14:00. By mid-afternoon, the UV Index drops to 5 at 15:00 and continues its downward trajectory, reaching 2 at 16:00. As the sun sets, the UV index decreases to 1 by 17:00 and ultimately settles at 0 by 18:00, signifying the end of significant UV exposure for the day. It's a reminder that while the sun's rays can be intense at midday, the morning and late afternoon offer safer conditions for outdoor activities.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | 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 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | 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 |
| Urucui | 15 | 15 | 15 | 14 | 12 | 11 | 11 | 12 | 13 | 13 | 14 | 14 |