Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Tanah Merah, Indonesia, as it plays a significant role in protecting skin health and preventing sunburn. With its tropical climate, Tanah Merah often experiences intense sunlight, especially during peak hours when UV levels can soar to a striking 12. Being informed about daily UV fluctuations allows you to take necessary precautions, such as wearing protective clothing and sunscreen, to safeguard your skin against harmful UV radiation. By staying aware of the UV Index, you can enjoy the beautiful outdoors while minimizing risks associated with overexposure to the sun.
At dawn, the UV Index starts off gently at 1 by 07:00, but as the morning unfolds, it swiftly climbs. By 09:00, the index hits 6, indicating a moderate risk of harm from unprotected sun exposure. The sun reaches its zenith around noon, peaking at a scorching 12 at 12:00. 11:00 to 12:00 marks the most dangerous hours for sun exposure, with the UV Index staying at 11 and 12, so sunscreen is essential! After this peak, a gradual decline begins. By 14:00, it drops to 7, and then further descends into the afternoon and evening, stabilizing at 0 by 19:00, indicating a safe end to sun exposure for the day. This data serves as a reminder to stay sun-safe during those critical midday hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | 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 | 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 data indicates extremely high levels of UV radiation throughout the year, particularly in the peak months of January to April, where the UV Index reaches a maximum of 17. This signifies a high-risk period for sunburn, with a burn time of merely 10 minutes for unprotected skin. Although the UV Index begins to decline slightly in the summer months, values remain in the 11 to 13 range from June through August, still warranting caution. The fall and winter months (September to December) continue to present high risks, with UV Index values between 14 and 16, reiterating the importance of sun safety year-round. Residents and visitors are strongly advised to take protective measures, such as wearing sunscreen, protective clothing, and seeking shade, to minimize the risks associated with 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 |
| Tanah Merah | 16 | 17 | 17 | 16 | 13 | 11 | 12 | 13 | 15 | 16 | 14 | 14 |