Last updated: June 2, 2025
Understanding the UV Index in Tres Rios, Brazil is crucial for safeguarding your skin and overall health. With a climate classified as Cfa, this vibrant region experiences a range of UV exposure, peaking at levels that can lead to sunburns and long-term skin damage. By staying informed about UV levels, especially during the midday sun when the index reaches as high as 6, residents and visitors can take proactive measures to protect themselves. Embrace sun safety and enjoy the beautiful outdoors without compromising your skin health!
The UV Index in this hourly snapshot reveals a dynamic pattern throughout the day. Early morning sees low levels, with a maximum of 1 at 7:00 AM and 8:00 AM, indicating minimal risk for skin damage. As the sun rises higher, the index climbs sharply, peaking at 6 between 11:00 AM and 1:00 PM, where caution is advised due to an increased risk of harm from unprotected sun exposure. By mid-afternoon, the index starts to drop, falling to 4 at 2:00 PM, and then further declines towards evening, with readings of 2 at 3:00 PM and returning to 1 by 4:00 PM. The day concludes with a relief as the index reaches 0 by 6:00 PM, signaling a safe time to be outdoors without sun protection. This data serves as a reminder to stay vigilant during peak hours to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 6 | 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 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant seasonal changes, with the highest levels occurring during the first half of the year. The high-risk months are from January to April and September to November, where the UV Index consistently falls within the extreme category, peaking at 16 in January and steadily remaining high through October with levels around 13-15. During these months, burn time is as short as 10 minutes, emphasizing the need for heightened sun protection measures. Conversely, the UV Index drops slightly in June and July, reaching a very high level of 6-8, with a more manageable burn time of 15-25 minutes. Visitors and residents are advised to remain vigilant year-round, particularly during high-risk periods, by using sunscreen, wearing protective clothing, and seeking shade whenever possible to minimize sun damage.
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 |
| Tres Rios | 16 | 15 | 13 | 11 | 8 | 6 | 8 | 10 | 12 | 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 |