Last updated: July 2, 2025
In Mäntyharju, Finland, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn, especially during the sunnier months. Understanding UV levels empowers residents to take necessary precautions against harmful UV radiation, which can lead to long-term skin damage. With Mäntyharju's Dfc climate, characterized by its distinct seasonal changes, certain times of the day can present higher risks, particularly between 10 AM and 3 PM when the UV Index peaks at 6. By staying informed and adopting protective measures, you can enjoy the beautiful outdoors while keeping your skin safe from the sun's harmful effects.
The UV Index throughout the day presents a clear peak in intensity, rising steadily from a gentle 1 at 07:00 to an assertive maximum of 6 between 12:00 and 14:00. This midday surge emphasizes the importance of sun protection, as the index then gracefully descends back to 1 by 19:00. From 08:00 to 11:00, values increase moderately, showcasing an inviting morning glow, while midday hours certainly warrant caution as the sun reaches its zenith. After 15:00, a gradual decline signals a retreat of UV intensity, allowing a more relaxed late afternoon. Armed with this timely information, outdoor enthusiasts can plan their activities with sun safety in mind!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with a notable increase during the warmer months. January to February experience low UV levels (Index 1), allowing for a more extended burn time of 45 minutes. As spring arrives in March, the UV Index rises to 3, indicating a moderate risk, necessitating caution with an exposure limit of 30 minutes. The summer months, especially June and July, present a high-risk scenario with indexes reaching 6 and 7 respectively, where it's advised to limit sun exposure to 25 minutes to prevent skin damage. August sees a decrease to a moderate level, while September returns to a more manageable 3. As autumn transitions into winter, UV levels decrease again to low (Indexes of 1 and 2), allowing for longer safe exposure times of 45 minutes. Residents and visitors are encouraged to remain vigilant during June to July, using sunscreen and protective clothing to safeguard against harmful UV radiation.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tampere UVI | 1 | 1 | 3 | 4 | 5 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Maentyharju | 1 | 1 | 3 | 4 | 5 | 6 | 7 | 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 |