Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Tanah Merah, Indonesia, where the tropical climate brings intense sun exposure nearly year-round. Knowledge of UV levels is essential for preventing sunburn and maintaining long-term skin health, as the region often experiences high UV readings, particularly during peak hours. With maximum UV Index values reaching a staggering 14 at noon, it's vital for the community to stay informed about daily fluctuations in UV radiation to guard against harmful effects. Being aware of these risks empowers everyone to make safer choices while enjoying the beautiful, sunlit landscapes of Tanah Merah.
The UV Index throughout the day showcased a pronounced peak, reaching a remarkable 14 at 12:00 PM. Starting the morning with a mild 1 at 7:00 AM, the index gradually climbed, hitting 8 by 10:00 AM. The ascent continued dramatically, with midday sun intensifying the UV output to its highest levels. As the afternoon progressed, the index showed a gradual decline, tapering down to 7 by 3:00 PM and further to a gentle 2 by 5:00 PM. By sunset, the UV Index dropped to a safe 0, signaling the end of a day under the sun's powerful rays. Remember to protect your skin 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 | 8 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV index fluctuates throughout the year, peaking in the early months, with extreme levels consistently recorded from January through May, including a high of 17 in March and April. February offers the highest UV index at 16, maintaining an exposure category of extreme, with recommended burn time of just 10 minutes. As summer approaches, UV levels slightly decrease but remain extreme, with June witnessing a UV index of 14 and gradually tapering to 13 in December. September and October present mild fluctuations, yet still retain a UV index of 15 and 16 respectively. Visitors and residents should exercise caution during these high-risk months, especially from January through May, emphasizing the necessity of protective measures such as sunscreen, clothing, and sunglasses to prevent harmful 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 |
| Tanah Merah | 15 | 16 | 17 | 17 | 16 | 14 | 13 | 15 | 15 | 16 | 14 | 13 |