Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Tundagan, Indonesia, where the tropical climate brings with it significant risks of ultraviolet (UV) radiation exposure. Knowing the UV levels helps you make informed decisions to prevent sunburn and protect your skin health throughout the day. With peak UV indexes reaching up to 11 between 11:00 AM and 12:00 PM, awareness of when to seek shade or use sunscreen becomes essential. As Tundagan's climate can lead to high UV exposure, being educated about these daily changes can safeguard your skin while enjoying the beautiful outdoors.
At the break of dawn, the UV Index begins its gentle rise, starting at a mild 1 at 07:00. By 08:00, it escalates to a moderate 3, signaling the sun’s growing intensity. Things heat up as the clock strikes 09:00, reaching a 5, before peaking at a striking 11 by 11:00 and 12:00—the time for sun protection is now! As the afternoon wanes, the index gradually declines: down to 9 at 13:00, then settling at 7 by 14:00. The evening brings relief with a drop to 4 by 15:00, further to 2 at 16:00, and eventually fading to 1 at 17:00. By 18:00, the UV implications disappear altogether with a 0, making the evening safe for outdoor activities. Remember, it’s crucial to stay protected during those peak 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 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 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 |
The UV Index experiences notable fluctuations throughout the year, with the highest values recorded from January to April and during July to October, classified as extreme. February and March hold the peak UV Index at 16, indicating a burn time of just 10 minutes. The months of May and June transition to a slightly lower UV Index, categorized as very high, with a burn time extending to 15 minutes in June before returning to the extreme category from July onward. Thus, high-risk months for UV exposure are February, March, and the period from July to October. Given the severe potential for sunburn during these times, it is essential for both visitors and residents to follow sun safety practices, including wearing sunscreen, protective clothing, and seeking shade to mitigate risks, particularly during peak sun hours.
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 |
| Tundagan | 14 | 16 | 16 | 14 | 12 | 10 | 11 | 12 | 14 | 15 | 14 | 14 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |