Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents of Sarandi, Brazil, where the climate is characterized as Cfa, marked by warm summers and mild winters. With UV levels peaking around midday, awareness of these fluctuations is essential for preventing sunburn and maintaining long-term skin health. During the hottest hours, with the UV Index reaching as high as 5, individuals should take extra precautions to safeguard themselves from harmful sun exposure. By keeping an eye on the UV Index daily, Sarandi's residents can enjoy the sun while protecting their skin from potential damage.
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 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | 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 exhibits significant seasonal fluctuations, with extreme levels particularly pronounced from January to March and again in October to December. During these high-risk months, especially in January and February with an index of 15 and a burn time of just 10 minutes, individuals are at increased risk of skin damage. The spring months, notably April, shift to a very high exposure category with a UV Index of 10, while May and August mark a transition to high levels. From June to July, the UV Index lowers to moderate, allowing for slightly longer safe exposure times up to 30 minutes. As the season shifts back to autumn, September returns to very high, underlining the need for vigilance. To protect yourself, it's advisable for visitors and residents to utilize broad-spectrum sunscreen, seek shade, and wear protective clothing, especially during the extreme months of the year.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sarandi | 15 | 14 | 13 | 10 | 6 | 5 | 5 | 7 | 10 | 13 | 14 | 15 |
| 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 |