Last updated: July 2, 2025
Awareness of the UV Index is crucial for residents of Sidoaji, Indonesia, where the typical tropical climate can lead to high levels of UV exposure throughout the day. Understanding UV levels is vital for sunburn prevention and maintaining skin health, especially when the index reaches a peak of 12 between 11:00 AM and 12:00 PM. These elevated UV levels present significant risks, highlighting the importance of taking precautions, such as wearing sunscreen and protective clothing, particularly during the sun's most intense hours. By staying informed about the UV Index, you can enjoy the beautiful Sidoaji sun while minimizing potential harm to your skin.
The UV Index throughout the day presents a striking pattern of intensity. Starting from a mild level of 1 at 07:00, the sun steadily gains strength, peaking at an impressive 12 between 11:00 and 12:00. As the morning progresses, 09:00 and 10:00 also see significant values of 7 and 10, respectively. After midday, the intensity begins to wane, dipping to 10 at 13:00 before gradually decreasing to 3 by 15:00. In the late afternoon and evening, the UV Index falls sharply—registering only 1 at 16:00 and tapering down to 0 from 18:00 onwards. This data highlights the importance of sun protection during peak hours, especially when the UV Index reaches its zenith.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 10 | 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 |
Throughout the year, the UV Index remains consistently extreme, with values ranging from 11 to 16, indicating a high risk of harm from unprotected sun exposure. The months of January to March represent the peak UV Index levels at 14 to 16, where burn time is critically short at 10 minutes. While other months like April to July show slightly lower indices, they still maintain an extreme exposure category. Notably, September to November also uphold high UV levels between 15 to 16, emphasizing the necessity for vigilance. Visitors and residents are strongly advised to take protective measures against sun exposure year-round, such as wearing sunscreen, wide-brimmed hats, and UV-protective clothing, and seeking shade, particularly during peak sun hours.
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 |
| Sidoaji | 14 | 15 | 16 | 15 | 12 | 11 | 12 | 14 | 15 | 16 | 15 | 15 |