Last updated: May 3, 2025
Understanding the UV Index is crucial for the residents of Silonang, Indonesia, where the tropical climate brings significant sun exposure throughout the year. With peak UV levels reaching as high as 12 during midday, awareness of these levels is essential for preventing sunburn and protecting long-term skin health. By monitoring the UV index, you can make informed decisions about outdoor activities and necessary sun protection measures. Given Silonang’s warm climate, understanding how UV exposure varies throughout the day can help ensure that you enjoy the sun safely while minimizing risks associated with harmful ultraviolet radiation.
The UV Index data paints a vivid picture of the sun's intensity throughout the day. Early risers will find a gentle start with a max UV Index of 1 at 07:00, but by 08:00, it ramps up to a moderate 4. Mid-morning shines with a peak at 9:00, reaching 7, and by 10:00, it escalates to 10, signaling a prime time for sun protection. The sun is at its strongest between 11:00 and 12:00, with the UV Index hitting its maximum of 12—a crucial hour for sunscreen application! As the afternoon sets in, the index gracefully declines to 10 at 13:00, dipping further to 7 by 14:00. By late afternoon, the UV levels drop to a mere 4 at 15:00 and sink to 1 by 16:00, leading into the evening where the index quiets to 0 after 18:00. Remember, day planning should consider these fluctuations to safeguard against 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 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | 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, seasonal UV changes exhibit consistently high levels, with extreme UV Index ratings persisting from January to March, reaching a peak of 16 in both February and March. Notably, September and October also register a UV Index of 16, positioning them as critical months for sun exposure risk. The high-risk months for UV exposure span February, March, September, and October, where the potential for skin damage is significantly elevated, with a minimal burn time of just 10 minutes across all months. Visitors and residents are strongly advised to take precautionary measures during these times, such as wearing protective clothing, using a high-SPF sunscreen, and seeking shade to minimize the risk of sunburn and long-term skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surabaya UVI | 13 | 15 | 14 | 12 | 12 | 10 | 11 | 12 | 14 | 13 | 13 | 13 |
| Bekasi UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Jakarta UVI | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
| Medan UVI | 13 | 15 | 15 | 15 | 14 | 12 | 12 | 13 | 14 | 14 | 13 | 12 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |
| Silonang | 15 | 16 | 16 | 14 | 12 | 11 | 12 | 13 | 16 | 16 | 15 | 14 |