Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Antonina, Brazil, where the sun can shine brightly and pose serious risks to skin health. By monitoring UV levels, you can effectively prevent sunburns and reduce long-term damage associated with harmful ultraviolet rays. In this Cfa climate zone, Antonina experiences varying UV exposure throughout the day, peaking at 6 between noon and 1 PM. Being aware of these fluctuations helps you enjoy the beautiful Brazilian outdoors while safeguarding your skin from potential harm. Stay informed and protect yourself under the sun!
The UV Index forecast showcases a dynamic day ahead, starting off gently in the early morning with values of 1 at 07:00 and 08:00. As the sun rises higher, we see a gradual increase, peaking at 6 between 12:00 and 13:00, indicating a need for sun protection during these hours. Particularly, the 11:00 and 12:00 slots mark significant levels, reaching 5 and 6 respectively, suggesting that outdoor activities should be planned with caution. As the afternoon progresses, the UV Index dips to 5 at 14:00 and continues to fall, descending to 3 by 15:00. By evening, the UV Index returns to a safer level of 1 by 16:00, and drops to 0 from 18:00 onwards, indicating a soothing end to the day.
| 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 | 6 | high | 25 min |
| 14:00 | 5 | 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, the UV Index varies significantly, peaking in the winter and late autumn months. From January to April, the UV Index remains at a dangerous level, reaching as high as 15 in January and December, and remaining in the extreme exposure category with a burn time of only 10 minutes. As the year progresses into May and June, the risk decreases slightly, with a UV Index of 7 to 6, classified as high, allowing for 25 minutes of safe exposure. However, August sees a spike to 8 in the very high exposure category, reducing burn time to just 15 minutes. The risk resurges in September and October as the index returns to extreme levels, demanding caution with again only 10 minutes before burn. Residents and visitors should take extra precautions during these high-risk months, particularly from January to April and again in September and October. It’s advisable to apply sunscreen, wear protective clothing, and limit outdoor activities during peak UV times.
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 |
| Antonina | 15 | 14 | 13 | 11 | 7 | 6 | 6 | 8 | 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 |