Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Guajara, Brazil, where the tropical climate can lead to significant sun exposure throughout the day. As the UV levels peak around midday, it’s essential to grasp the implications of these readings to prevent sunburn and protect your skin health. With maximum UV Index values soaring to 11 during the hottest hours, awareness of these levels can help you make informed decisions about sun safety. Stay vigilant against the risks of intense UV radiation and enjoy the vibrant outdoor lifestyle that Guajara has to offer!
The UV Index throughout the day paints a vivid picture of solar intensity, peaking sharply in the late morning. At 07:00, the UV Index starts off modestly at 1, but by 08:00, it climbs to 3, indicating a gradual increase in sunlight. As the day progresses, it reaches 5 at 09:00 and then escalates dramatically to 8 by 10:00. The sun's strength hits its zenith at 11:00 with a striking 10, peaking even further at 12:00, where it soars to 11—an optimal time for sun protection. After this high, the UV Index begins to wane, falling back to 10 at 13:00, before declining steadily to 4 at 15:00, 2 at 16:00, and eventually drifting down to 1 by 17:00. As dusk approaches, the UV Index drops to 0 by 18:00, signaling a safe end to sun exposure for the day. Such daily fluctuations highlight the importance of being mindful of UV levels, especially during midday hours.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 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 | 7 | 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 |
The UV Index shows extreme levels throughout the year, with consistently high values from January to April, peaking at 16 during these months. May to October sees slightly lower, but still extreme, levels, ranging from 11 to 13. Notably, January, February, and March are identified as the highest-risk months due to their prolonged extreme UV exposure. Visitors and residents should be particularly cautious during these times, taking proactive measures to protect their skin, such as wearing broad-spectrum sunscreen, protective clothing, and seeking shade during peak sunlight hours. Always remember that 10 minutes of unprotected sun exposure can result in a sunburn, underscoring the importance of sun safety 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 |
| Guajara | 15 | 16 | 16 | 16 | 13 | 11 | 11 | 12 | 12 | 12 | 13 | 13 |