Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Grainau, Germany, where the stunning Alpine landscape often invites outdoor activities. As the sun rises higher, so do the UV levels, peaking around midday with an index reaching 8, indicating a significant risk of harm from unprotected sun exposure. Awareness of UV levels is essential in preventing sunburn and protecting skin health, particularly in a region where clear skies can amplify UV radiation. With a temperate maritime climate, Grainau experiences unique UV exposure risks, making it vital for everyone to stay informed and take necessary precautions during sunny days. Prioritize your skin's safety and enjoy the beautiful outdoors wisely!
The UV index throughout the day reveals a fascinating pattern of sun intensity. Early risers will notice a gentle start at 1 around 7:00 AM, gradually climbing to a moderate 3 by 9:00 AM. As the sun reaches its peak, the index hits 6 at 11:00 AM, escalating to an impressive 8 from 12:00 PM to 2:00 PM—the height of solar exposure. After this, the UV levels begin to wane, dropping to 7 at 3:00 PM, and further decreasing to moderate numbers of 5, 3, and 2 as the sun sets, concluding the day with a calm 1 at 7:00 PM. Remember, during the peak hours, sun safety is crucial!
| 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 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | 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 |
Throughout the year, the UV Index undergoes notable seasonal fluctuations, with high-risk months identified from April to August when levels soar to between 7 and 9, indicating a very high exposure category. May and June are particularly critical, as the UV Index reaches the peak of 9, yielding a rapid burn time of just 15 minutes. Visitors and residents are advised to exercise caution during these months by seeking shade, wearing protective clothing, and applying sunscreen frequently. As the year progresses towards September, there is a slight decrease in UV levels, classified as high, before tapering off in the fall and winter months, where the UV Index generally returns to low and moderate categories. Regular UV index checks and protective measures are essential for safe outdoor activities, particularly during the peak summer months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hamburg UVI | 1 | 2 | 3 | 5 | 7 | 8 | 7 | 7 | 5 | 3 | 2 | 1 |
| Berlin UVI | 1 | 2 | 4 | 5 | 7 | 8 | 7 | 7 | 5 | 3 | 2 | 1 |
| Koeln UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |
| Frankfurt am Main UVI | 2 | 3 | 4 | 5 | 8 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |
| Munich UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Grainau | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 6 | 4 | 3 | 2 |