Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Reweng, Indonesia, as it plays a key role in protecting your skin from harmful UV radiation. With a tropical climate characterized by high humidity and significant sunlight, awareness of UV levels helps prevent sunburn, skin aging, and more serious health issues. The UV Index spikes dramatically from 8 AM to 1 PM, with peak values reaching 12—indicating a high risk of harm from unprotected sun exposure. By staying informed about these levels, you can take proactive measures to safeguard your health and enjoy the beautiful sunny days that Reweng has to offer.
As the day unfolds, the UV Index begins to rise steadily, peaking at 12 around noon, indicating a high risk of harm from unprotected sun exposure. Starting from a mild 1 at 07:00, it climbs to 2 by 08:00, then surges to a significant 9 by 10:00. The intensity continues to escalate, reaching its maximum at 11 by 11:00, just before noon. After a slight dip to 8 by 14:00, the UV Index begins its gradual decline, dropping to 2 by 16:00, and finally resting at 0 by 18:00—a clear indication that the sun's rays are no longer a concern. To protect your skin, it's crucial to seek shade and apply sunscreen during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | 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 remain consistently high, indicating extreme exposure risk. From January to April, the UV Index peaks at 16, presenting a significant risk of skin burns with a burn time of just 10 minutes. Although there is a slight decrease in the index during the summer months, May through July, the values still warrant caution, particularly in August and September when the index rises back to 16. Visitors and residents should be particularly vigilant during the high-risk months of February, March, September, and October, when the UV Index remains at its most dangerous levels. To mitigate risks, we strongly advise wearing protective clothing, using high-SPF sunscreen, and seeking shade whenever possible, especially during midday hours. This proactive approach is essential in safeguarding against the harmful effects of prolonged sun exposure.
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 |
| Reweng | 15 | 16 | 16 | 15 | 12 | 11 | 12 | 14 | 16 | 15 | 15 | 14 |