Last updated: May 3, 2025
Understanding the UV Index is essential for residents and visitors of Araioses, Brazil, as it serves as a key indicator of sun exposure risks throughout the day. With UV levels peaking between 10 AM and 2 PM, reaching an extreme value of 13, awareness of these fluctuations can help prevent sunburn and support long-term skin health. Araioses, situated in a tropical climate, experiences intense sunlight, making it crucial for locals to take proactive measures against harmful UV rays. Staying informed about the UV Index not only empowers you to enjoy the beautiful outdoors safely but also protects your skin from potential damage.
Starting at 7:00 AM, the UV Index is a mild 1, gradually rising as the sun climbs in the sky. By 8:00 AM, it reaches 4, making it a good time for sun protection. The intensity peaks sharply at 10:00 AM with a maximum index of 10, continuing to hold strong at 13 during the midday hours of 11:00 AM and 12:00 PM. This is the critical window when sun exposure can cause harm, so seek shade or wear protective gear if you're outside! As the afternoon progresses, the index begins to dip: it drops to 11 at 1:00 PM, then to 8 by 2:00 PM, before further declining to 4 at 3:00 PM. By 4:00 PM, it decreases to 2, prompting a cautious approach to the sun. Finally, as the day winds down, the index falls to 1 by 5:00 PM, and eventually drops to 0 after 6:00 PM, signaling that it's safe to enjoy the evening outdoors without worries about UV exposure.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 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, the UV Index remains consistently high, indicating a persistent risk of overexposure to UV radiation. The months of March (UV Index 16) and April (UV Index 15) stand out as the peak periods for UV intensity, classifying them as extremely high-risk months, with a burn time of only 10 minutes for unprotected skin. Visitors and residents are strongly advised to take preventive measures during these months, including wearing broad-spectrum sunscreen, protective clothing, and sunglasses. Awareness and caution should be exercised year-round, as the UV Index remains elevated from January through December, necessitating vigilance in sun safety practices.
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 |
| Araioses | 14 | 14 | 16 | 15 | 13 | 12 | 11 | 12 | 13 | 12 | 13 | 13 |