Last updated: July 2, 2025
In Vranov nad Dyji, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn, particularly during the sunniest parts of the day. Understanding UV levels helps residents and visitors alike to take necessary precautions against harmful UV radiation. Situated in a Cfb climate zone, Vranov nad Dyji experiences distinct seasonal variations, with summer months presenting significant UV exposure risks that can peak at an index of 8 around midday. By staying informed about UV conditions, you can enjoy the outdoors safely while protecting your skin from potential damage.
Starting the day with a gentle UV Index of 1 at 7:00 AM, the sun gradually intensifies, reaching 2 by 8:00 AM. By 9:00 AM, the index climbs to 4, marking the beginning of a more active sun exposure period. The peak arrives at 12:00 PM, where the UV Index hits a robust 8, indicating that it's time to seek shade and lather on the sunscreen. Throughout the afternoon, the levels maintain a high of 8 until 2:00 PM, before gently tapering off to 7 by 3:00 PM and gradually declining to 5 by 4:00 PM, and further down to 3 by 5:00 PM. As the day winds down, the index falls to 2 at 6:00 PM and finally settles back to 1 by 7:00 PM, signaling a safe return to outdoor activities as the sun sets. Stay sun-smart and enjoy your day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | 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, UV levels vary significantly, with the highest risk months occurring from May to August, where the UV Index reaches a peak of 9 in June and remains at 8 during July and August, indicating a very high exposure category and a critical burn time of just 15 minutes. In contrast, winter months see much lower UV levels, with January and November registering a UV Index of 2 and December dropping to 1, categorized as low exposure. Visitors and residents should exercise caution during the high-risk months by minimizing sun exposure, wearing protective clothing, and applying sunscreen regularly, particularly between late spring and early fall when UV radiation is at its strongest.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prague UVI | 2 | 3 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Ostrava UVI | 2 | 2 | 4 | 6 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Olomouc UVI | 2 | 3 | 4 | 6 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 2 |
| Pilsen UVI | 2 | 3 | 5 | 6 | 8 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Brno UVI | 2 | 3 | 5 | 6 | 8 | 8 | 8 | 7 | 6 | 4 | 2 | 2 |
| Vranov nad Dyji | 2 | 3 | 5 | 6 | 8 | 9 | 8 | 8 | 6 | 4 | 2 | 1 |