Last updated: June 2, 2025
In Lastovo, Croatia, being aware of the UV Index is crucial for maintaining healthy skin and preventing painful sunburn. Understanding the daily UV levels helps residents and visitors alike make informed decisions about sun exposure, especially during the peak hours when the index soars to a high of 9 around midday. With Lastovo's Mediterranean climate, characterized by warm, sunny summers, the risks of harmful UV radiation are elevated, making it essential to take protective measures during outdoor activities. Stay safe and enjoy the sun responsibly by keeping a close eye on the UV Index!
The UV Index throughout the day presents a clear pattern of intensity, peaking at midday. Starting from a mild level of 1 at 07:00, the index rises steadily, reaching 2 by 08:00. The real surge occurs between 09:00 and 13:00, where it escalates from 4 to a striking 9—the highest point of the day. As the afternoon unfolds, the intensity slightly declines to 7 at 15:00, before tapering off to 5 at 16:00. The evening sees a further decrease, settling back to 2 by 18:00 and returning to 1 at 19:00. For those enjoying outdoor activities, it’s essential to take precautions, especially during the peak hours from 11:00 to 14:00 when the UV rays are most potent.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the year progresses, the UV Index experiences significant fluctuations, indicating varying levels of sun exposure risk. From January to February, the UV Index rises from 2 (low) to 4 (moderate), marking the beginning of increased exposure. The spring months of March and April see another jump to 6 and 7 (both high), respectively. The summer months of May through August are particularly concerning, with UV Index values reaching a peak of 10 in July, categorized as very high and resulting in very short burn times of just 15 minutes. As the year wanes, the index decreases, with September and October experiencing high to moderate levels (7 and 5), before returning to a low of 2 by December. Visitors and residents should take extra precautions during the high-risk months of May through August, limiting sun exposure and employing protective measures such as sunscreen, hats, and sunglasses to safeguard against skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osijek UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |
| Zagreb UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 5 | 3 | 2 |
| Rijeka UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |
| Zadar UVI | 2 | 4 | 5 | 7 | 8 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |
| Split UVI | 2 | 4 | 6 | 7 | 8 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |
| Lastovo | 2 | 4 | 6 | 7 | 8 | 9 | 10 | 9 | 7 | 5 | 3 | 2 |