Last updated: July 2, 2025
Understanding the UV Index in Esperantina, Brazil, is crucial for protecting your skin from harmful ultraviolet radiation. With the city’s warm climate classified as Aw, residents and visitors alike should be aware of the varying UV levels throughout the day—especially during peak hours when the index can reach a high of 11. By monitoring these levels, you can prevent sunburn and safeguard your long-term skin health. As sunlight becomes more intense around midday, knowing when to seek shade and apply sunscreen can make all the difference in maintaining your well-being under the Brazilian sun.
The UV Index throughout the day paints a vivid picture of solar intensity, peaking sharply in the late morning. At 07:00, the UV Index starts off modestly at 1, but by 08:00, it climbs to 3, indicating a gradual increase in sunlight. As the day progresses, it reaches 5 at 09:00 and then escalates dramatically to 8 by 10:00. The sun's strength hits its zenith at 11:00 with a striking 10, peaking even further at 12:00, where it soars to 11—an optimal time for sun protection. After this high, the UV Index begins to wane, falling back to 10 at 13:00, before declining steadily to 4 at 15:00, 2 at 16:00, and eventually drifting down to 1 by 17:00. As dusk approaches, the UV Index drops to 0 by 18:00, signaling a safe end to sun exposure for the day. Such daily fluctuations highlight the importance of being mindful of UV levels, especially during midday hours.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | 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 |
The UV Index shows an extreme risk of harm from unprotected sun exposure throughout the year, with very high levels observed from January to March, peaking at 16 in March. This indicates that the sun’s rays can cause skin burn in as little as 10 minutes. April maintains a high UV Index of 15, and while there is a slight decrease in June and July (both at 11), the exposure risk remains severe. August and September return to a UV Index of 13, continuing the call for diligent sun protection. As October progresses to 12 and into the late autumn months, visitors and residents should still remain vigilant, especially since November and December retain a UV Index of 13. To minimize risk, it is essential for everyone to apply sunscreen, wear protective clothing, and seek shade during peak sun hours throughout all seasons.
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 |
| Esperantina | 14 | 14 | 16 | 15 | 13 | 11 | 11 | 13 | 13 | 12 | 13 | 13 |