Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents of Sliven, Bulgaria, where the sunny, temperate climate can elevate UV exposure levels significantly. By monitoring UV levels, you can take proactive steps to prevent sunburn and maintain healthy skin. With peak UV readings reaching as high as 10 around midday, it’s essential to recognize the risks associated with intense sun exposure, especially during the summer months. Stay informed and protect yourself and your loved ones by knowing the UV Index in your area—it's a simple yet effective way to enjoy the beautiful Bulgarian sunshine safely!
As the sun rises, the UV Index gradually climbs, beginning at a mild 1 at 7:00 AM. By 9:00 AM, it reaches 3, prompting early risers to consider sun protection. The intensity peaks at 1:00 PM with a maximum of 10, signaling the most hazardous conditions for unprotected skin. As the afternoon unfolds, the index dips from 9 at 2:00 PM to 6 by 4:00 PM, offering a brief respite. As the day winds down, the UV rays decrease, falling to 2 by 6:00 PM and returning to a safe 1 by 7:00 PM. Stay mindful of these fluctuations to enjoy the sun while safeguarding your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with the highest levels typically occurring from April to August. During this peak period, the UV Index reaches very high levels, particularly in June with a maximum of 10, indicating a burn time of only 15 minutes. March marks the transition to higher risk, classified as high, with a UV Index of 6 and a burn time of 25 minutes. Conversely, the winter months of January and December show a low UV Index of 2, allowing for extended exposure of up to 45 minutes without risk of burns. Given this data, it is crucial for visitors and residents to take extra precautions during April to August by wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ruse UVI | 2 | 4 | 6 | 7 | 8 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |
| Varna UVI | 2 | 4 | 6 | 7 | 8 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |
| Burgas UVI | 2 | 4 | 6 | 7 | 9 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |
| Sliven | 2 | 4 | 6 | 8 | 9 | 10 | 9 | 9 | 7 | 6 | 3 | 2 |
| Plovdiv UVI | 2 | 4 | 6 | 8 | 9 | 10 | 9 | 9 | 7 | 6 | 3 | 2 |
| Sofia UVI | 2 | 4 | 7 | 7 | 9 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |