Last updated: June 2, 2025
In Coari, Brazil, understanding the UV Index is crucial for maintaining skin health and preventing sunburn. With its tropical climate, residents and visitors alike face heightened exposure to harmful ultraviolet rays, particularly between 10 AM and 2 PM, when UV levels peak at 11—the highest on the scale. By keeping an eye on the UV Index, you can take proactive steps to protect yourself from skin damage and enjoy the beautiful outdoor activities Coari has to offer, all while caring for your skin’s long-term health. Stay informed, stay protected!
As the sun rises, the UV Index starts off low at 1 by 07:00, gradually climbing to a moderate 2 by 08:00. The UV exposure takes a significant leap at 09:00, reaching 5, and then surges to a high of 11 between 12:00 and 13:00, marking the day’s peak. As the afternoon progresses, the intensity begins to wane, dropping to 8 by 14:00, before sliding back to 5 at 15:00. The evening hours bring relief, with the index descending to 2 by 16:00, and finally settling at 1 by 17:00. By 19:00, the UV Index returns to 0, signaling a complete retreat of harmful rays as daylight fades, underscoring the importance of sun protection during those peak midday hours!
| 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 | 11 | extreme | 10 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 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains consistently high, predominantly categorized as extreme, indicating a significant risk of harm from unprotected sun exposure. The highest monthly UV Index readings occur from January to April, peaking at 16, with a rapid burn time of just 10 minutes. Following this peak, the UV Index remains high, though slightly lower in May to July, where it ranges from 11 to 13, before tapering slightly in the later months of the year. Despite this slight decline, August through November still maintain an extreme exposure risk, underscoring the need for caution. Visitors and residents are strongly advised to take protective measures, such as wearing sunscreen, hats, and sunglasses, and to limit sun exposure, particularly during these high-risk months. Remember, a burn can occur in as little as 10 minutes, so staying informed and protected is essential for health and 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 |
| 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 |
| Coari | 15 | 16 | 16 | 16 | 13 | 11 | 11 | 12 | 12 | 13 | 13 | 13 |