Last updated: August 1, 2025
In Butia, Brazil, being aware of the UV Index is crucial for safeguarding your skin health under the vibrant sun. Understanding UV levels helps prevent sunburn and long-term skin damage, ensuring that your time outdoors is safe and enjoyable. With a Cfa climate characterized by hot summers and moderate winters, Butia experiences notable UV exposure, especially during peak hours when the index reaches 5 around noon. Stay informed and take proactive measures to protect yourself from the sun’s rays while soaking in Butia's beautiful landscapes!
The UV Index data reveals a dynamic progression throughout the day. Starting at 0 at 7:00 AM, the intensity begins to rise slowly, reaching 1 by 8:00 AM and 9:00 AM. By 10:00 AM, it escalates to 3, indicating a moderate level of UV exposure. 11:00 AM sees the index peak at 4, and the sun reaches its zenith by noon with a UV Index of 5, marking a high risk level. The afternoon maintains this peak at 5 until 1:00 PM, before gradually declining to 4 at 2:00 PM and further down to 3 by 3:00 PM. As the sun sets, the UV radiation drops sharply, returning to 1 at 4:00 PM and 5:00 PM, and finally back to 0 from 6:00 PM onward. Awareness of these fluctuations can guide outdoor plans, ensuring protection during the peak UV hours!
| 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 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, seasonal UV changes show extreme levels from January to March, with a UV Index peaking at 14 during these months and a rapid burn time of just 10 minutes. As spring progresses, April sees a decrease to a UV Index of 9, indicating a very high exposure category, with burn times extending to 15 minutes. By May, the UV Index drops to 6 (high), where residents can spend up to 25 minutes in the sun without burning. The summer months of June and July bring about a moderate UV Index of 4 and 5 respectively, allowing for 30 minutes of sun exposure before a burn occurs. However, from August to October, a rise to high and extreme levels returns, urging caution with burn times shrinking back down to 15-10 minutes in September and October. November and December again reflect extreme conditions, with Ultraviolet exposure remaining a concern. Visitors and residents are strongly advised to employ sun protection measures—such as wearing sunscreen, hats, and protective clothing—especially during the high-risk winter and early spring months, to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Butia | 14 | 13 | 12 | 9 | 6 | 4 | 5 | 7 | 9 | 12 | 13 | 14 |
| 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 |
| 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 |