Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Birayang, Indonesia, where the tropical Af climate brings intense sunlight year-round. With UV levels peaking at a significant 12 around noon, being aware of these indices is essential for sunburn prevention and maintaining skin health. The marked fluctuation in UV exposure throughout the day, from a manageable 1 early in the morning to a hazardous 12 shortly after, underscores the importance of protective measures, especially during peak hours. Equip yourself with this knowledge to enjoy the beautiful outdoors safely while mitigating the risks associated with high UV radiation.
The UV Index throughout the day paints a vivid picture of solar intensity. Starting with a mild 1 at 07:00, the index gradually climbs, reaching 2 by 08:00. A noticeable surge occurs around 09:00, where it hits 4, followed by a significant jump to 7 at 10:00. The peak of the day arrives at 12:00, with an impressive 12, reflecting the sun’s most potent rays. The intensity begins to decline after this peak, dropping to 9 at 14:00 and further down to 6 by 15:00. As the evening approaches, the UV Index falls back to 3 at 16:00 and returns to a comfortable 1 by 17:00, concluding the day with a trivial 0 by 19:00. This data underscores the importance of sun safety during peak hours! 🌞
| 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 | 12 | 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 notably high, with values consistently in the extreme exposure category, particularly between January and October. The highest UV readings occur in February and March at 16, while April and May follow closely with indices of 15 and 14, respectively. As summer approaches, the index dips slightly in June and July to 12, before rising again in August to 14 and peaking in September at 15. The months of February, March, September, and October are critical high-risk periods for UV exposure. Visitors and residents are strongly advised to take precautionary measures during these months, including wearing sunscreen, protective clothing, and seeking shade, as the potential for skin damage from sun exposure is significant, with a burn time of just 10 minutes across all months.
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 |
| Birayang | 15 | 16 | 16 | 15 | 14 | 12 | 12 | 14 | 15 | 16 | 14 | 14 |