Last updated: May 3, 2025
In Piracicaba, Brazil, understanding the UV Index is vital for maintaining skin health and preventing sunburns, especially in a city known for its warm Cfa climate. As UV levels can rise significantly during midday—with peaks reaching 8 around noon—being aware of these fluctuations helps residents and visitors alike protect themselves from harmful effects of excessive sun exposure. Staying informed about the UV Index not only promotes skin safety but also encourages outdoor enjoyment while minimizing risks. Whether you're basking in the sun or simply going about your day, knowing the UV levels in Piracicaba ensures you can stay safe and healthy under the sun.
The UV Index data paints a vivid picture of sun exposure throughout the day. In the early hours, from 7:00 AM to 9:00 AM, the UV Index remains low, peaking at only 1. However, as the sun climbs higher, from 10:00 AM to 12:00 PM, it surges to 8 at noon, marking the peak of solar intensity. The afternoon sees a slight decline, with the index dropping to 5 at 2:00 PM and further to 3 by 3:00 PM. As evening approaches, the UV levels plummet back to a safe 1 by 4:00 PM, and the sun's diminishing rays result in a 0 by 6:00 PM, signaling a welcome reprieve from UV exposure. Essentially, the peak intensity occurs during midday hours, highlighting the importance of seeking shade and wearing protection during these critical hours.
| 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 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | 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 experiences significant fluctuations, with the highest levels typically occurring in the winter months. January, February, and December consistently exhibit an extreme UV Index of 16, demanding a swift burn time of only 10 minutes. The months of March, April, September, October, and November also fall into the extreme category (with indices ranging from 11 to 14) and require similar caution for skin exposure within 10 minutes. Conversely, May and August present very high levels, with indices of 8 and 9, necessitating careful use of sun protection for up to 15 minutes. The summer months of June and July show a slight decrease to high levels (6 and 7) with burn times extending to 25 minutes. Given this data, it is crucial for both visitors and residents to exercise particular caution from late winter through early fall, especially during the extreme months, by using adequate sun protection and limiting direct sunlight exposure.
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 |
| Piracicaba | 16 | 16 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 16 |
| 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 |