Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Guarujá, Brazil, where the sun shines brightly beneath its tropical climate. Awareness of UV levels plays a pivotal role in preventing sunburn and promoting skin health, making it essential to monitor daily fluctuations. With peak UV exposure typically occurring around midday, when values can reach as high as 6, it's important to protect yourself from potential skin damage. As you enjoy the stunning beaches and outdoor activities in Guarujá, keep an eye on the UV Index to ensure your sun safety.
The UV Index today showcased a notable increase from the early morning hours, starting at a gentle 1 at 07:00 and 08:00. As the sun rose higher in the sky, the index climbed steadily, reaching a significant 6 by 12:00, indicating a peak in UV radiation and the need for sun protection. The afternoon saw a slight decline, with values dropping to 4 at 14:00 and falling further to 2 by 15:00. As the day wound down, the UV index returned to a safer range, ending the day at 0 by 19:00. It’s crucial to stay informed and safeguard your skin during those high UV hours!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 1 | low | 45 min |
09:00 | 2 | low | 45 min |
10:00 | 4 | moderate | 30 min |
11:00 | 5 | moderate | 30 min |
12:00 | 6 | high | 25 min |
13:00 | 5 | moderate | 30 min |
14:00 | 4 | moderate | 30 min |
15:00 | 2 | low | 45 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 |
Throughout the year, UV Index levels fluctuate significantly, with the months of January through April and September through November marked by extreme exposure (UV Index 11 and above) and a very short burn time of just 10 minutes. Notably, February and November see a peak UV Index of 14, indicating heightened risk. The high-risk months for UV exposure, therefore, are January, February, September, October, and November. Conversely, during the warmer months of May to August, the UV Index decreases to very high and high categories, with longer burn times of 15 to 25 minutes. Visitors and residents are advised to take precautions during these high-risk periods, such as wearing protective clothing, using high-SPF sunscreen, and seeking shade when UV levels are at their peak.
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 |
Guaruja | 15 | 14 | 12 | 11 | 8 | 6 | 6 | 9 | 11 | 13 | 14 | 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 |