Last updated: July 2, 2025
Understanding the UV Index in Isale, Burundi is crucial for protecting your skin and maintaining overall health in this Cwb climate zone, which can present unique sun exposure risks. With UV levels peaking at 11 around noon, it's essential to be aware of how these fluctuations can impact sunburn risk and long-term skin health. By keeping track of the UV Index, you can enjoy outdoor activities while safeguarding yourself against harmful effects of sun exposure, ensuring your time in Isale is both enjoyable and safe.
The UV Index begins its ascent at 07:00 with a low reading of 1, gradually rising to 2 by 08:00. As the day progresses, the intensity of UV radiation peaks at 12:00, hitting a maximum of 11—a critical level where sun protection is essential. Following this zenith, the index starts to decline, measuring 10 at 13:00, then tapering off to 8 by 14:00. By mid-afternoon, the UV Index drops to 5 at 15:00 and continues its downward trajectory, reaching 2 at 16:00. As the sun sets, the UV index decreases to 1 by 17:00 and ultimately settles at 0 by 18:00, signifying the end of significant UV exposure for the day. It's a reminder that while the sun's rays can be intense at midday, the morning and late afternoon offer safer conditions for outdoor activities.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | 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 |
Throughout the year, UV Index levels remain consistently high, categorizing exposure as extreme. From January to April, the UV Index peaks at 15 to 16, indicating that visitors and residents should be extremely cautious, as the burn time is as little as 10 minutes. Although there is a slight decline in exposure levels from May to July—with values ranging from 11 to 14—the risk remains significant throughout the warmer months. August to October sees a slight increase again, particularly in September. Notably, December maintains a UV Index of 13, emphasizing the need for sun protection measures year-round. Visitors and residents are strongly advised to take appropriate precautions, such as wearing sunscreen, protective clothing, and sunglasses, to minimize UV-related health risks, especially during these high-risk months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bujumbura UVI | 14 | 15 | 16 | 16 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |
| Isale | 15 | 15 | 16 | 15 | 14 | 12 | 11 | 13 | 14 | 13 | 13 | 13 |
| Ruyigi UVI | 15 | 15 | 16 | 16 | 13 | 11 | 11 | 13 | 14 | 13 | 13 | 13 |
| Muyinga UVI | 15 | 15 | 16 | 15 | 14 | 12 | 12 | 13 | 14 | 13 | 13 | 13 |
| Ngozi UVI | 15 | 16 | 16 | 16 | 14 | 12 | 11 | 13 | 15 | 13 | 13 | 13 |
| Gitega UVI | 15 | 16 | 17 | 16 | 14 | 12 | 12 | 13 | 14 | 13 | 13 | 14 |