Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Koroni, Greece, where beautiful, sun-drenched days can pose serious risks to skin health. High UV levels, especially during midday hours, can lead to sunburn and long-term skin damage, making it essential to stay informed. With Koroni's Mediterranean climate, characterized by warm summers and ample sunshine, awareness of the UV Index helps you enjoy the outdoors safely. Peak UV levels typically reach a dangerous 10 around noon, underscoring the importance of protective measures during your time under the sun. Stay proactive to safeguard your skin while soaking in the charm of this coastal gem!
The UV Index is a dynamic measure of solar intensity throughout the day, peaking dramatically at 12:00 PM with a notable 9, reaching its zenith at 1:00 PM and 2:00 PM with a maximum value of 10. During this period, it's essential to protect your skin from harmful UV rays. Early morning hours remain quite low, peaking at just 1 by 08:00 AM, while by 10:00 AM the index climbs to 5. As the sun continues to rise, it climbs swiftly to 7 by 11:00 AM, making midday the crucial time for sunscreen and shade. As the afternoon wanes, the UV Index gradually decreases, falling back to 5 by 5:00 PM, and finally settling at 1 by 7:00 PM, signaling a safe return to outdoor activities. Stay vigilant and enjoy the sunshine safely!
| 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 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure levels fluctuate significantly, with the highest risk occurring during the late spring and summer months. From March to September, the UV Index reaches alarming levels, peaking at 10 from June to August. This signifies a very high exposure category, where the average burn time is a mere 15 minutes. The high-risk months include April through September, urging visitors and residents to exercise caution. It is advisable to seek shade, wear protective clothing, and apply sunscreen during these critical months. In contrast, the winter months of January, February, November, and December show a moderate UV Index of 3 to 5, where burn times extend to 30 minutes. Nevertheless, even in these months, taking preventive measures against UV exposure is beneficial.
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 |
| Koroni | 3 | 5 | 6 | 9 | 9 | 10 | 10 | 10 | 8 | 7 | 4 | 3 |