Last updated: July 2, 2025
In Lontar, Indonesia, awareness of the UV Index is crucial for protecting your skin and overall health. The UV Index serves as a helpful guide, indicating the level of ultraviolet (UV) radiation from the sun, which can lead to painful sunburns and long-term skin damage if not managed responsibly. With its tropical climate and peak UV levels soaring to 12 during midday, Lontar residents and visitors must be vigilant about sun exposure, especially between 10 AM and 2 PM when the risks are highest. Understanding the UV Index empowers individuals to make informed decisions about sun safety, allowing for enjoyable outdoor activities while safeguarding against the harmful effects of UV rays.
The UV Index tomorrow will experience a sharp ascent, beginning with a modest 1 at 07:00. As the sun rises higher, expect a steady increase, peaking at an intense 12 by noon. This midday high presents a strong risk of harm from unprotected sun exposure, with careful precautions recommended. The afternoon sees the index gradually descend, dropping to 6 by 15:00 and down to 1 by 17:00, signaling a cooling off as the day winds down. As evening approaches, the UV levels dip to 0 after sunset, making for a safe time to enjoy the outdoors without worry. Remember to protect your skin during peak hours, especially between 10:00 and 14:00!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains consistently high, peaking at 16 from January to March, indicating an extreme exposure category with a rapid burn time of just 10 minutes. April sees a slight decrease to 15, but the risk remains significant through May and June, where values drop to 14 and 12, respectively. The trend continues into the summer months of July and August, maintaining the extreme category but with a slight dip in index values. As the year progresses into September, October, and November, the UV Index fluctuates between 14 and 15, while December concludes the year at 13. Given the consistently high UV levels, it is crucial for both visitors and residents to take protective measures, such as wearing sunscreen, protective clothing, and seeking shade, especially during the highest-risk months of January through March.
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 |
| Lontar | 15 | 16 | 16 | 15 | 14 | 12 | 12 | 13 | 14 | 15 | 14 | 13 |