Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Alegrete, Brazil, as it plays a key role in promoting skin health and preventing sunburn. With its Cfa climate, Alegrete experiences varying UV levels throughout the day, peaking at 5 between midday and early afternoon. This highlights the importance of being aware of UV exposure risks to safeguard your skin during outdoor activities. By checking the UV Index regularly, you can better protect yourself against harmful rays and enjoy the beautiful Brazilian sun safely.
The UV Index data for the day reveals a progressive ascent in solar intensity, starting from a peaceful 0 at 07:00. As the sun rises higher in the sky, it peaks at 5 between 12:00 and 13:00, indicating a moderate risk for sun exposure. 11:00 and 10:00 see values of 4 and 2 respectively, signaling an increasing need for sun safety measures. As the afternoon unfolds, readings gently descend, dropping back to 3 by 15:00 and tapering to 0 after 18:00. Overall, it’s a day where vigilance is key during the midday hours, while mornings and evenings offer a respite from harmful rays.
| 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 | 2 | low | 45 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 |
The UV Index in this region displays significant seasonal variations, peaking in the winter months with extreme exposure levels. From January to March, the UV Index remains alarmingly high (ranging from 14 to 15), indicating high-risk months for sunburn with a burn time of just 10 minutes. As spring arrives in April, the index drops slightly to 9 (very high), allowing for a longer burn time of 15 minutes. During the summer months of June and July, the UV Index stabilizes around 5 (moderate), providing somewhat safer conditions with 30 minutes of burn time. However, it rises again in August at 7 (high) and returns to 9 in September (very high). As autumn transitions to winter, October, November, and December re-enter extreme levels with UV indices between 12 and 14 (10-minute burn times). Visitors and residents are advised to take precautions, using sunscreen, wearing protective clothing, and seeking shade, particularly during the high-risk months from January to March and again in October to December.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alegrete | 15 | 14 | 12 | 9 | 6 | 5 | 5 | 7 | 9 | 12 | 14 | 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 |