Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Slawi, Indonesia, where the tropical climate can lead to high levels of ultraviolet radiation, especially during midday hours. With UV Index values soaring to a maximum of 10 around noon, awareness of these levels becomes vital for preventing sunburn and maintaining overall skin health. By keeping track of the UV Index, you can take proactive measures to protect yourself during the hottest parts of the day. Slawi's climate, characterized by significant sunlight and distinct wet-dry seasons, underscores the necessity of this knowledge to enjoy the outdoors safely while reducing the risk of harmful UV exposure.
From sunrise to sunset, the UV Index tells a compelling story of the day's sun. Starting at a gentle 1 at 07:00, the UV levels gradually rise, peaking at an intense 10 by 11:00 and 12:00. This signifies a critical window for sun safety, as exposure during these hours demands caution. Just after noon, the index begins to decline, slipping to 9 at 13:00 and further down to 6 by 14:00. As the evening approaches, the numbers diminish swiftly to 4 at 15:00, and finally taper off to a relaxing 1 by 17:00, with complete relief from UV exposure by 19:00 when it hits 0. It's clear that being sun-smart is essential especially during the midday peak!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index values throughout the year reveal significant seasonal changes in UV exposure. From January to April, the index remains extremely high, peaking at 15 in both February and March, with a rapid burn time of just 10 minutes. As spring progresses into summer, from June to July, the index dips slightly to 10, categorized as very high, allowing for an increased burn time of 15 minutes. However, it rises again in August and returns to extreme levels in September, October, and November, maintaining a swift burn time of 10 minutes. Residents and visitors should be particularly vigilant from January to April and again in the late summer and early fall months, practicing sun safety by seeking shade, wearing protective clothing, and applying sunscreen frequently.
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 |
| Slawi | 14 | 15 | 15 | 13 | 12 | 10 | 10 | 12 | 14 | 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 |