Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Astambul, Indonesia, particularly given the region's tropical climate. With UV levels peaking at 12 during midday, awareness of these values is essential for protecting against sunburn and maintaining long-term skin health. By monitoring daily UV exposure, you can take proactive steps to safeguard your skin, ensuring enjoyable outdoor activities while minimizing the risk of harmful effects from the sun's rays. In Astambul's typically warm and sunny weather, being informed about UV risks enables a balanced approach to sun safety and promotes overall well-being.
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 in March and slowly decreasing to 14 in May and 14 in November and December. January, February, March, and April are particularly notable for having extreme UV levels, with all months reporting a UV Index of 14 or higher, indicating a high-risk period for sun exposure. Residents and visitors should remain vigilant, especially during these months, and take necessary precautions such as using sunscreen, wearing protective clothing, and limiting sun exposure to avoid skin damage. Even in the summer months of June, July, and August, the UV Index remains dangerously high (between 11 and 13), emphasizing the importance of sun safety year-round. Remember, the burn time is consistently 10 minutes across all months, underscoring the need for swift action to protect skin from harmful UV radiation.
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 |
| Astambul | 14 | 15 | 16 | 15 | 14 | 11 | 12 | 13 | 14 | 15 | 14 | 14 |