Last updated: August 1, 2025
Understanding the UV Index is essential for the residents of Posio, Finland, as it serves as a vital guide for managing sun exposure and protecting skin health. With its Dfc climate, Posio experiences varying UV levels throughout the day, peaking at 6 around midday, which can significantly increase the risk of sunburn and long-term skin damage. By being aware of the UV Index, locals can make informed decisions about outdoor activities, ensuring they take necessary precautions to enjoy the sun safely and maintain their skin's health.
As the sun rises, the UV Index begins to climb, starting at a gentle 1 at 07:00. By 08:00, it reaches 2, signaling the need for some sun protection. The intensity continues to build throughout the morning, peaking at 6 between 13:00 and 14:00—a prime time for outdoor activities, albeit with caution. As the afternoon wanes, the UV levels gracefully dip, dropping to 4 by 16:00 and returning to 1 by 19:00. It’s a reminder to stay sun-smart early and take advantage of the milder UV levels as the day progresses. Enjoy the sunshine, but don’t forget that protection is key!
| 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 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 4 | moderate | 30 min |
| 13:00 | 4 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index values exhibit notable seasonal changes, indicating varying levels of sun exposure risk. January through March sees a low UV Index (1-2), where the risk of harm from unprotected sun exposure remains minimal, allowing for a burn time of 45 minutes. April and May usher in a moderate UV Index (3-5), increasing risk with recommended protection measures; burn time decreases to 30 minutes. The high-risk months of June and July peak at a UV Index of 6, necessitating strict sun safety practices due to a reduced burn time of just 25 minutes. As summer transitions to fall, the UV Index gradually lowers from 4 in August to 3 in September and back to 2 in October, where sun exposure risk diminishes again to profile low levels (1-2) in November and December. Residents and visitors should exercise caution during the higher UV Index months, particularly in late spring and summer, by wearing protective clothing, applying sunscreen regularly, and seeking shade during peak sunlight hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Posio | 1 | 1 | 2 | 3 | 5 | 6 | 6 | 4 | 3 | 2 | 1 | 1 |
| Tampere UVI | 1 | 1 | 3 | 4 | 5 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Vantaa UVI | 1 | 1 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Espoo UVI | 1 | 1 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Helsinki UVI | 1 | 1 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Turku UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |