Last updated: May 3, 2025
In Rio Grande, Brazil, understanding the UV Index is crucial for protecting your skin from harmful sun exposure. During peak hours, UV levels can reach as high as 5, making awareness essential for sunburn prevention and long-term skin health. With a Cfa climate that features warm summers and moderate UV exposure, residents and visitors alike must stay informed about daily UV fluctuations. By keeping an eye on the UV Index, you can better enjoy Rio Grande's sunny days while safeguarding your skin against damage.
The UV Index today showcases a dynamic rise and fall throughout the day. Starting from a gentle 1 at 07:00, the intensity gradually climbs, peaking at 5 between 12:00 and 13:00—ideal for sun-seekers to soak up some rays but also a reminder for caution. As the afternoon transitions into evening, the index dips back down to 1 by 17:00 and ultimately reaches 0 after 18:00, signaling the end of peak sun exposure. Keep an eye on the UV Index, especially during those midday hours, to enjoy the sun safely!
| 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 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | 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 |
Throughout the year, UV Index levels vary significantly, with the highest values occurring in the winter months. From January to March, the UV Index consistently peaks at 14 to 12, placing these months in the extreme exposure category where unprotected skin may burn within 10 minutes. Following this, April sees a decrease to 8, categorized as very high, with a burn time of 15 minutes. By May and June, the index drops to moderate levels of 5 and 4, allowing for safer sun exposure at about 30 minutes for unprotected skin. However, as summer transitions to fall, September and October witness a rise again to 9 and 11, categorized as very high and extreme respectively, with burn times of 15 and 10 minutes. November and December return to extreme levels, mirroring the beginning of the year. Visitors and residents are strongly advised to prioritize sun protection, especially from January through March and during October and November, by wearing sunscreen, protective clothing, and seeking shade when necessary to mitigate the risks associated with high UV exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rio Grande | 14 | 13 | 12 | 8 | 5 | 4 | 4 | 6 | 9 | 11 | 13 | 14 |
| 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 |