Last updated: July 2, 2025
In Lammi, Finland, understanding the UV Index is crucial for safeguarding your skin during the sunny months. With typical UV levels peaking at 6 around noon, awareness of these fluctuations can be pivotal in preventing sunburn and promoting overall skin health. Given Lammi's Dfc climate with varying exposure risks throughout the day, knowing when to seek shade or apply sunscreen can make all the difference. Stay informed and protect yourself from the potential hazards of UV radiation while enjoying the beauty of Finland's summer days!
During a sunny day, the UV Index showcases a dynamic rise and fall in intensity. At 07:00, the index starts modestly at 1, perfect for a relaxed morning outdoors. By 09:00, it climbs to 3, signaling a bit more caution as midday approaches. The index peaks at 12:00 with a robust 6, urging sun-seekers to slather on sunscreen. Continuing through the afternoon, it settles at the peak of 6 from 12:00 to 15:00, maintaining its strength before gradually tapering off. By 17:00, it drops to 3, and as evening approaches, it reaches a gentle 2 around 19:00. This hourly UV rollercoaster reminds us to stay sun-safe, especially during those midday hours!
| 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 | 6 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 2 | low | 45 min |
As the seasons change, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk throughout the year. From January to February, the UV Index remains low at 1, allowing for a burn time of 45 minutes without significant risk. March marks the beginning of a rise, with a moderate exposure category of 3 (burn time: 30 min), continuing through to May when it reaches 5. The high-risk months are June and July, where the UV Index peaks at 6, necessitating caution with a reduced burn time of 25 minutes. By August, the index drops back to 5, with September and October further decreasing to 3 and 2 respectively. Visitors and residents should be particularly vigilant during the summer months of June and July, ensuring adequate skin protection such as sunscreen, hats, and sunglasses, while still enjoying the outdoors responsibly in the moderate months of March, April, May, August, and September.
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 |
| Lammi | 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 |