Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Brasilia, Brazil, where the high altitude and sunny climate can lead to significant UV exposure throughout the year. With peak UV levels often reaching as high as 10 around midday, awareness of sun safety measures is essential to prevent sunburn and protect skin health. In this tropical savanna climate, the strong sun can pose risks even on seemingly mild days, making it important to know the UV Index so you can enjoy the outdoors safely while minimizing the harmful effects of ultraviolet radiation. Stay informed and safeguard your skin by checking the UV levels before heading outside!
The hourly UV Index reveals a dynamic range of sun exposure today. Starting off at a gentle 1 at 7:00 AM, the index steadily climbs, peaking at a striking 10 by 12:00 PM—the peak exposure time. As the sun reaches its zenith, caution is advised for outdoor activities during the 11:00 AM to 1:00 PM window when the index remains high at 9 and 10. Following this midday surge, the index gracefully descends; by 3:00 PM, it dips to 4 and continues to decline to 1 by 5:00 PM. Finally, after a brief respite, the UV rays fade to 0 by 6:00 PM, signaling a safe return for evening outdoor plans. Stay sun-smart and enjoy the day wisely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit notable fluctuations, with extreme exposure occurring consistently from January to April, culminating in a high of 16 during those months. As we transition into the summer months, the UV Index drops slightly in June and July to a very high category of 9 and 10, allowing for a slightly longer burn time of 15 minutes. However, August's return to an extreme rating of 12 and the subsequent months maintain high-risk exposure until November. Given these data, it is crucial for both visitors and residents to take proactive measures against UV radiation by seeking shade, wearing protective clothing, and applying sunscreen during the high-risk months, particularly from January to April and again in August through November, where burn times could be as short as 10 minutes.
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 |
| 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 |
| Brasilia | 16 | 16 | 15 | 13 | 11 | 9 | 10 | 12 | 14 | 15 | 15 | 16 |