Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sofia, Bulgaria. As the UV levels can soar, particularly during the summer months, being aware of these readings is vital for preventing sunburn and maintaining skin health. Sofia's Cfb climate, characterized by warm summers, exposes residents to heightened UV risks, especially between 10 AM and 2 PM when the index can reach alarming levels—peaking at 10 during midday. Stay informed about the UV Index to safeguard your skin while enjoying the vibrant city!
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 variation, peaking during the summer months. January and December present the lowest UV levels (Index 2), categorized as low, with a burn time of 45 minutes. In contrast, the months of May, June, and July reach critical levels, with a UV Index of 10, classified as very high and a burn time of just 15 minutes. April and August also remain high, at 7 and 9 respectively, while March and September see a moderate fall to a UV Index of 7, considered high. Those at risk should be particularly cautious from March through August, as these months present elevated UV exposure. Visitors and residents alike are advised to prioritize sun protection measures—such as wearing sunscreen, protective clothing, and sunglasses—especially during these high-risk months to minimize skin damage and health risks.
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 | 2 | 4 | 7 | 7 | 9 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |