Last updated: July 2, 2025
In Istiaia, Greece, understanding the UV Index is crucial for safeguarding your skin health under the Mediterranean sun. With maximum UV levels peaking at 10 between noon and 2 PM, residents and visitors alike must be vigilant to prevent sunburn and long-term skin damage. This charming coastal town, characterized by its Csa climate with hot, dry summers, exposes inhabitants to significant UV risk, especially during midday hours. By staying informed about daily UV levels, you can take proactive steps to enjoy the beautiful Greek outdoors while protecting your skin.
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 |
The UV Index varies throughout the year, highlighting the importance of sun safety for both visitors and residents. From January to February, the UV levels are categorized as moderate (UV Index 3-4), with a burn time of 30 minutes. As spring approaches, March sees an increase to a high risk (UV Index 6) with a burn time of 25 minutes, followed by a peak in April through August, where the UV Index reaches 10 and is classified as very high, necessitating precautions as burn time decreases to 15 minutes. September remains very high (UV Index 8) but offers a slight reprieve with a burn time of 15 minutes, before transitioning back to moderate levels in November and December (UV Index 3-4), with burn times returning to 30 minutes. It is crucial for everyone to take protective measures—such as wearing sunscreen and protective clothing—especially during the high-risk months from March to September.
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 |
| Istiaia | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 8 | 6 | 4 | 3 |
| 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 |