Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Sao Mateus, Brazil, where the sun's rays can be particularly intense. With a tropical climate characterized by hot and humid conditions, awareness of UV levels is essential for preventing sunburn and promoting long-term skin health. During midday, the UV Index can soar as high as 7, indicating a high risk of harm from unprotected sun exposure. By staying informed about these levels, you can take proactive steps to protect your skin and enjoy the sunny days that this vibrant region has to offer.
Today’s UV index chart showcases an exciting yet cautious journey through the hours. Starting off with a low 1 at 07:00, the intensity gradually rises, peaking at 7 between 11:00 and 12:00, signaling the need for sun protection. As the clock ticks past noon, the UV index begins to taper off, dipping to 4 by 14:00, then steadily declining to 0 by 17:00, rendering the evening hours safe for outdoor activities. This hourly data emphasizes the importance of vigilance during peak hours, especially around midday, when sun safety should be a top priority!
| 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 | 6 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 2 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 0 | 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 |