Last updated: May 3, 2025
Understanding the UV Index is crucial for anyone enjoying the sunny shores of Cabo Frio, Brazil. With its warm Aw climate, the region invites sun-seekers and beach lovers alike, but this also brings a heightened risk of harmful UV exposure. Knowing the UV levels can help prevent sunburn and safeguard your skin health, making your time in the sun not just enjoyable but safe. During peak hours, such as between 10 AM and 2 PM, UV Index values can soar to 8, indicating a very high risk of harm from unprotected sun exposure. Stay informed and protect yourself to fully enjoy Cabo Frio’s beautiful beaches!
The UV Index for today follows a clear pattern, peaking sharply in the late morning and early afternoon. Starting low at 1 at 07:00, it gradually climbs to a midday high of 8 at 12:00, marking the highest UV exposure of the day. At 11:00, it reaches 7, signaling a time when sun protection is essential. After this peak, the index begins to taper off, dropping to 4 by 14:00 and decreasing further to 2 by 15:00. As the day cools, the UV Index falls to 1 by 16:00 and ultimately drops to 0 after 18:00, indicating a safe end to outdoor activities as the sun sets. Remember, when the UV Index is high, protect yourself with sunscreen, hats, and shade to enjoy the sun safely!
| 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 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 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 |
The UV Index exhibits significant seasonal variations, peaking during the winter months with extreme levels, especially from January to April, where values range from 13 to 16 and the burn time is notably short at 10 minutes. This trend continues into September and October, with similarly high indices warranting caution. As the year progresses, May to August sees a moderate decline in UV levels, categorized as very high to high, allowing slightly longer exposure times of up to 25 minutes in June and July. High-risk months include January, February, March, April, September, October, and November, when the UV Index remains in the extreme category, necessitating strong sun protection measures. Visitors and residents are advised to wear protective clothing, use broad-spectrum sunscreen, and limit sun exposure during peak hours, particularly in higher risk months to ensure safety and skin health.
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 |
| Cabo Frio | 16 | 14 | 13 | 11 | 8 | 6 | 7 | 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 |