Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Kestilae, Finland, where outdoor activities are a cherished part of life. As the sun rises high in the sky, awareness of UV levels can make a significant difference in preventing sunburn and maintaining long-term skin health. In this climate zone (Dfc), where UV exposure can vary throughout the day, knowing when the index peaks—reaching a maximum of 6 around noon—can help you take necessary precautions. By staying informed and taking protective measures, you can enjoy the beautiful Finnish summer while safeguarding your skin from harmful ultraviolet radiation.
Starting early in the morning, the UV Index gradually climbs, reaching a peak of 6 at noon and maintaining that level until 2 PM. By 7 AM, it’s a mild 1, but as the sun rises higher, the intensity escalates to 5 by 11 AM. The highest point occurs at 12 PM, where caution is advised for outdoor activities. As the afternoon progresses, the index slightly dips to 5 at 3 PM, before gradually falling back to 2 by 7 PM. This pattern suggests that planning outdoor ventures during the midday hours warrants protective measures, while later hours are more forgiving for fun in the sun.
| 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 | 2 | low | 45 min |
The seasonal UV index exhibits significant fluctuations throughout the year. During the winter months of January, February, October, November, and December, the UV index remains low (1), with a burn time of 45 minutes. As we transition into spring, the UV index increases to moderate levels (3-4) in March, April, and May, necessitating a burn time of 30 minutes and encouraging visitors to use sunscreen during outdoor activities. The summer months, especially June and July, present the highest risk, with a UV index of 6 classified as high, reducing burn time to just 25 minutes. August sees a slight decrease to moderate levels (5), followed by a return to moderate (3) in September, before dropping back to low levels in October through December. Residents and visitors are advised to take precautions during June and July, including wearing protective clothing and using sunscreen, to minimize the risk of sunburn and long-term skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kestilae | 1 | 1 | 3 | 3 | 4 | 6 | 6 | 5 | 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 |