Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Mriyunan, Indonesia, where the tropical climate presents unique challenges for sun exposure. The UV Index, which measures the strength of ultraviolet radiation from the sun, is vital for preventing sunburn and protecting skin health. High UV levels, particularly from 10 AM to 2 PM, when they can reach an intensity of 11, can increase the risk of skin damage and long-term health issues. With Mriyunan's typical sunny weather, it's essential to stay informed about UV levels to enjoy the outdoors safely while protecting your skin from harmful rays.
As the sun rises, the UV Index climbs steadily, starting at a gentle 1 at 7:00 AM. By 8:00 AM, it reaches 3, marking the beginning of increased sun exposure. The day continues to heat up, with the index peaking at a remarkable 11 from 11:00 AM to 12:00 PM, indicating a high risk for harm from unprotected sun exposure. As the afternoon sets in, it gradually declines, dropping to 6 by 2:00 PM and subsequently to 3 by 3:00 PM. As the sun begins to descend, the index returns to a safer 1 by 4:00 PM and tapers off to 0 after 6:00 PM. This hourly trend underscores the importance of sun protection during the midday hours when the UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 6 | high | 25 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 data shows significant seasonal variation, with consistently extreme levels throughout much of the year. From January to May, the UV Index peaks at 16 in February and remains above 13, indicating a critical need for protective measures against skin damage, with a burn time of just 10 minutes. As summer approaches, June sees a drop to 10, categorized as very high, with a slightly extended burn time of 15 minutes. However, the UV levels surge again in July and August, remaining in the extreme range. September through November continues to feature high risks, with burn times back down to 10 minutes. December ends the year at an UV Index of 13. Visitors and residents should take proactive measures during these high-risk months, particularly from January to May and during the peak summer months, by applying sunscreen, wearing protective clothing, and seeking shade to minimize exposure and reduce the risk of sunburn.
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 |
| Mriyunan | 14 | 16 | 15 | 14 | 13 | 10 | 11 | 12 | 14 | 14 | 14 | 13 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |