Last updated: June 2, 2025
Understanding the UV Index is essential for residents and visitors of Randumerak, Indonesia, where the tropical climate brings a significant risk of ultraviolet radiation. Awareness of UV levels helps in preventing sunburn, safeguarding skin health, and reducing long-term risks, including skin cancer. Peak UV exposure often occurs during midday, with indices soaring as high as 11, underscoring the importance of taking precautions during these hours. With Randumerak's warm climate, recognizing these levels can make a vital difference in enjoying the sun safely while protecting your skin.
As the day dawns, the UV Index starts off gently at 2 by 7:00 AM, making it a perfect time for a morning stroll. By 8:00 AM, it climbs to 4, encouraging early risers to enjoy the sunshine while being mindful of sun exposure. At 9:00 AM, it reaches 6, signaling that protection is advisable. By 10:00 AM, the index surges to a peak of 9, alerting everyone to the need for sunscreen as the sun is at its most intense. 11:00 AM brings the day's maximum UV Index of 11, a critical hour to seek shade or wear protective gear. As noon approaches, the UV Index dips slightly to 10 and begins a slow descent through the afternoon. By 1:00 PM, it rests at 8, then gradually falls to 5 at 2:00 PM, before continuing to decrease to 3 by 3:00 PM. As the sun starts its descent, the levels drop to 1 by 4:00 PM and remain mild through the evening, finally settling to 0 by 6:00 PM. Through this rollercoaster of UV exposure, staying informed and protected is key to enjoying outdoor activities safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 3 | 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 |
The UV Index trends indicate extreme exposure levels throughout the year, with values consistently ranging from 13 to 16. The highest-risk months are February (16), March (15), and September (15), where residents and visitors should exercise particular caution. The consistently low burn time of just 10 minutes across all months emphasizes the need for diligent sun protection. It is imperative for individuals to apply sunscreen regularly, seek shade during peak hours, and wear protective clothing regardless of the season to minimize the risk of harmful UV 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 |
| Randumerak | 13 | 16 | 15 | 14 | 13 | 11 | 12 | 13 | 15 | 15 | 14 | 13 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |