Last updated: June 2, 2025
In the picturesque town of Mirai, Brazil, understanding the UV Index is crucial for maintaining skin health and preventing sunburn. With a climate characterized by warm, sunny days typical of the Aw climate zone, residents and visitors alike face varying UV exposure risks throughout the day. Being aware of the UV levels—from a moderate index of 3 at 09:00 to a peak of 7 at noon—empowers you to take necessary precautions and enjoy the sun safely. Taking these simple steps can significantly reduce the risk of skin damage and ensure a healthier lifestyle under the vibrant Brazilian sun.
Today’s UV Index showcases a dynamic progression throughout the day. Beginning with a gentle 1 at 07:00, the index steadily climbs, peaking at a robust 7 by 12:00—a reminder to stay protected around midday when sun exposure is strongest. The afternoon sees a slight decline, with values tapering to 4 at 14:00, before dropping to 2 by 15:00, and eventually settling at 1 by 17:00. As evening approaches, UV exposure recedes to 0 after 18:00, marking a safe time for outdoor activities without the worry of sunburn. Be sure to keep sunscreen handy during the peak hours for optimal protection!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | 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 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV exposure in the region experiences significant fluctuations. The highest risk months, characterized by an extreme UV Index, are from January to April and then again in September through November, where the burn time is consistently around 10 minutes. In these months, residents and visitors should take extra precautions, such as wearing sunscreen and protective clothing, to prevent skin damage. Conversely, May and June see a dip into the very high to high categories, with burn times extending to 15 and 25 minutes respectively. While these months are slightly less intense, it’s still essential to remain vigilant about sun safety. As summer approaches with July and August maintaining very high levels, it’s imperative for everyone to remain protected outdoors. The UV Index begins to rise again in September, particularly noteworthy for its quick transition back to extreme levels. Overall, being aware of these seasonal UV changes can help safeguard health while enjoying outdoor activities year-round.
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 |
| Mirai | 16 | 15 | 13 | 11 | 8 | 7 | 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 |