Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Razlog, Bulgaria, a picturesque town nestled amid a Cfb climate that offers both stunning landscapes and unique sun exposure. As the sun rises, so does the risk of harmful ultraviolet (UV) radiation, reaching a maximum of 10 during midday hours. Being aware of UV levels is vital for preventing sunburn and safeguarding your skin health, especially in a region where outdoor activities are popular. With peak UV ratings typically occurring around noon, knowing how to protect yourself becomes essential for enjoying the sun safely while exploring the beautiful surroundings of Razlog.
The UV index begins its ascent at 07:00, starting at a gentle 1, then climbs gradually through the morning. By 10:00, it reaches a moderate 5, but from 11:00 onwards, the sun's intensity becomes pronounced, peaking at an impressive 10 between 13:00 and 14:00. After this zenith, the index dips to 8 at 15:00 and continues its decline, settling back to 2 by 18:00. As the day winds down into the evening, the UV index drops to a low 1 by 19:00, signaling a return to safer sun exposure levels. Enjoy the sunshine while staying protected during the high points!
| 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 | 10 | 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 |
Throughout the year, the UV Index experiences notable seasonal changes, with high-risk months primarily occurring from March to September. During this period, the UV Index peaks at 11 in June, categorizing it as extreme exposure, with a very short burn time of just 10 minutes. The months of May, July, and August also present very high risk with UV Index values consistently at 10. Conversely, the winter months of January, February, November, and December exhibit moderate levels of UV exposure, allowing for longer burn times of 30 minutes. To ensure safety, visitors and residents should remain vigilant during high UV index months, using sunscreen, wearing protective clothing, and seeking shade, especially between 10 AM and 4 PM, when UV radiation is at its strongest.
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 |
| 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 |
| Razlog | 3 | 5 | 8 | 8 | 10 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |