Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Keratea, Greece, where sunny days and a Csa climate elevate the risk of harmful UV exposure. As UV levels peak during the day, awareness of these readings is essential to prevent sunburn and maintain long-term skin health. With peak UV Index values soaring to 10 during midday hours, it's vital to take protective measures while enjoying the beautiful Mediterranean sunshine. Stay informed to protect your skin and fully enjoy the outdoor lifestyle that Keratea has to offer!
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 | 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 |
As the seasons change, so do UV levels, significantly affecting both residents and visitors. From January to February, the UV Index starts at 3, categorizing exposure as moderate, with a burn time of 30 minutes. March sees an increase to 6, moving into high exposure, where burn time decreases to 25 minutes. The period between April and September marks the high-risk months, with UV Index values peaking at 10 from June to August, representing very high exposure and a critical burn time of just 15 minutes. As fall approaches, October presents a UV Index of 7, dropping to high exposure conditions, before returning to a moderate level in November and December (UV Index 4 and 3). Visitors and residents are strongly advised to take precautions during the high-risk months by wearing sunscreen, protective clothing, and limiting sun exposure 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 |
| Keratea | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 10 | 8 | 7 | 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 |