Last updated: May 3, 2025
Understanding the UV Index in São Mateus, Brazil, is crucial for your skin’s health and overall well-being. With the region's tropical climate, UV levels can peak significantly, especially during the midday hours, making it essential to be aware of sun exposure to prevent sunburn and long-term skin damage. Throughout the day, the UV Index in São Mateus can soar to notable levels, reaching up to 9 between 11:00 AM and 12:00 PM. By staying informed about UV risks, residents and visitors alike can take proactive steps to protect their skin and enjoy the sunny outdoor lifestyle safely.
The UV Index on this particular day presents a clear pattern of sun exposure. Starting at a mild level of 1 at 07:00, the intensity rises gradually, peaking at 9 between 11:00 and 12:00, indicating a high risk for skin damage without appropriate protection. As the afternoon progresses, the index begins to decline, dropping to 5 by 14:00 and swiftly decreasing to 1 by 16:00. After 17:00, the UV Index falls to 0, signaling a safe end to sun exposure for the day. For those planning outdoor activities, it’s essential to maximize protection during the peak hours when the index soars to its highest levels!
| 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 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 7 | 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 |
During the year, UV index levels show significant variation, with January to April consistently experiencing extreme levels (UV Index 15-12) and minimal safe exposure times of just 10 minutes, indicating high-risk months for skin damage. This trend continues with a notable increase in November and December, which also see extreme UV conditions. May marks a shift to very high exposure (UV Index 9) with a slightly extended burn time of 15 minutes. Throughout the summer months, June to August, UV levels remain high to very high (UV Index 7-10), allowing for longer safe exposure times of up to 25 minutes in June before returning to 15 minutes in July and August. September and October then revert to extreme conditions (UV Index 12-14) with a reduced burn time of 10 minutes. Given these fluctuations, it is crucial for visitors and residents to adopt protective measures—such as wearing sunscreen, protective clothing, and seeking shade—particularly during the high-risk months of January to April and September to November.
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 |
| Sao Mateus | 15 | 15 | 13 | 12 | 9 | 7 | 8 | 10 | 12 | 14 | 15 | 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 |