Last updated: July 2, 2025
Understanding the UV Index in Gastouni, Greece is crucial for safeguarding your skin against harmful ultraviolet rays, especially during the sun-soaked summer months characteristic of its Csa climate. With peak UV levels reaching up to 10 in the afternoon, awareness of these indices is essential for preventing sunburn and maintaining long-term skin health. By recognizing when the sun’s rays are most intense—typically between 11 AM and 2 PM—residents and visitors alike can take proactive measures to protect themselves and enjoy the beautiful, sunny days in Gastouni with peace of mind.
The UV Index (UVI) follows a distinct pattern throughout the day, starting from a low of 1 at 07:00 and 08:00. As the sun rises higher, the intensity increases, reaching 2 by 09:00. The real surge occurs between 10:00 and 13:00, where it climbs sharply to its peak of 10 at 13:00 and 14:00, indicating extremely high levels of UV radiation. As the afternoon wanes, the index gradually decreases, dropping to 4 by 17:00, then settling back to a comfortable 1 by 19:00. For those enjoying outdoor activities, it’s crucial to take precautions between 11:00 and 15:00 when the UVI is at its highest.
| 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 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | 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 shows significant seasonal changes, reaching its peak during the summer months. From January to February, UV levels are moderate, with a burn time of 30 minutes. As spring approaches, March sees an increase to a high index of 6, decreasing burn time to 25 minutes. April to August are considered high-risk, featuring very high UV levels of 8 to 10 and a burn time of just 15 minutes, making sun protection essential during these months. In September, the UV Index drops slightly to 8, while in October, it remains high at 7 with a burn time of 25 minutes. The UV levels then decline again in late fall and winter, returning to moderate levels of 3 to 4 by November and December. Visitors and residents are advised to take extra precautions during April to August, including wearing sunscreen, protective clothing, and seeking shade during peak hours to minimize the risk of UV exposure and 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 |
| Gastouni | 3 | 5 | 6 | 8 | 9 | 10 | 10 | 10 | 8 | 7 | 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 |