Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors in Ydra, Greece, where the Mediterranean climate brings radiant sunshine and alluring beaches. With average daily UV levels reaching 10 during the peak hours from noon to 2 PM, awareness of these levels is essential for protecting your skin health and preventing painful sunburns. By tracking the UV Index, you'll be better equipped to enjoy the stunning outdoor splendor of Ydra while minimizing risks associated with overexposure. Ensure your sun safety routine includes adequate protection on this sun-kissed island, where the risks of high UV exposure can rise significantly under the clear skies.
As the sun rises, the UV Index begins its gentle ascent, starting at 1 at 07:00. By 09:00, it climbs to 3, hinting at the day's potential for sun exposure. The heat peaks around 12:00, reaching a blistering 9, and hits its maximum at 13:00 and 14:00, both at a high of 10—a critical time for sun safety. As the afternoon transitions to evening, the UV Index gradually dips; by 18:00, it's down to 2, and as twilight approaches, it settles back at 1 by 19:00. Plan your outdoor activities wisely to stay safe in the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | 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 |
As the seasons change, so does the UV Index, affecting the risk of sun exposure for visitors and residents. From January to February, the UV Index ranges from 3 to 5, indicating a moderate risk with a burn time of 30 minutes. The risk significantly increases from March to September, peaking at 10 during the summer months (May to August), marking a very high risk with a short burn time of just 15 minutes. As October approaches, the UV Index begins to decline to 7, while November and December return to a moderate risk with an index of 4 and 3, respectively, allowing for a safe burn time of 30 minutes. Visitors and residents are advised to take precautions during the high-risk months, particularly between April and September, by seeking shade, wearing protective clothing, and applying sunscreen regularly to prevent skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thessaloniki UVI | 3 | 4 | 6 | 7 | 9 | 10 | 9 | 9 | 7 | 6 | 4 | 2 |
| Larisa UVI | 3 | 4 | 6 | 8 | 10 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |
| Patra UVI | 3 | 5 | 6 | 8 | 10 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |
| Piraeus UVI | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 8 | 7 | 4 | 3 |
| Athens UVI | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 8 | 7 | 4 | 3 |
| Ydra | 3 | 5 | 7 | 8 | 10 | 10 | 10 | 10 | 8 | 7 | 4 | 3 |