Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Ambarawa, Indonesia, where the tropical climate can lead to significant sun exposure throughout the year. Being aware of the UV levels not only helps in preventing sunburn but is also essential for maintaining overall skin health. During peak hours, UV Index readings can soar to 10, indicating a high risk of harm from unprotected sun exposure. With Ambarawa’s Af climate, characterized by high humidity and strong sunlight, recognizing these UV risks can empower locals and visitors alike to enjoy the beautiful outdoors safely while prioritizing their skin's well-being.
The UV Index for the day shows a steady climb as the sun rises, hitting its peak between 11:00 AM and 12:00 PM with a maximum value of 10. During this peak period, caution is advised as UV radiation can be extremely harmful. As the afternoon progresses, the index begins a gradual decline, dropping to 8 by 1:00 PM and tapering off to 3 at 3:00 PM. As the sun sets, the UV Index decreases further, reaching 0 by 6:00 PM and remaining there for the evening, signaling a safe time to enjoy outdoor activities without the risk of overexposure. Remember to wear sunscreen and protective clothing during the peak hours!
| 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 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | 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 shows significant seasonal variations, with the highest risk months occurring from January to April where the index remains consistently in the extreme range (14-16) and a rapid burn time of only 10 minutes. As we transition into May and June, the index slightly decreases, moving to a very high level (10-13) but still necessitating caution, with burn times extending to 15 minutes in June. The risk escalates again in July, August, September, and October, with the index peaking back at 14-15 in September and October, prompting the same quick burn time of 10 minutes. November and December maintain a steady high UV index of 14, emphasizing the need for protection throughout the year. Visitors and residents should take precautionary measures, including wearing sunscreen, protective clothing, and seeking shade, particularly during the peak months of January through April and July through October to minimize the risk of harmful UV exposure.
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 |
| Ambarawa | 14 | 16 | 15 | 14 | 13 | 10 | 11 | 13 | 14 | 15 | 14 | 14 |
| Bandung UVI | 15 | 16 | 16 | 15 | 12 | 11 | 11 | 12 | 14 | 15 | 15 | 14 |