Last updated: July 2, 2025
Understanding the UV Index in Vienna, United States, is crucial for protecting your skin and maintaining overall health in the sunny climate of this charming town. As summer approaches, the UV levels can rise significantly, peaking at 10 during midday hours—a level that poses risks for sunburn and long-term skin damage. By becoming aware of these UV levels, residents and visitors alike can take proactive measures against excessive sun exposure. With Vienna's humid subtropical climate, it’s essential to recognize the implications of daily UV fluctuations and plan outdoor activities accordingly to ensure safe and enjoyable experiences in the sun.
The UV Index data unveils a dynamic progression of sun intensity throughout the day. Starting low at 1 at 07:00, the index gradually escalates, reaching maximum levels of 10 between 12:00 and 14:00. This peak signals a critical time for sun protection. As the afternoon wanes, the index tapers off to 8 at 15:00, and then descends further to 3 by 17:00, and 2 by 18:00. Ultimately, the day concludes softly with a return to 1 at 19:00. It's essential to stay vigilant during those peak hours to safeguard your skin while enjoying the sun!
| 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 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 exhibits significant seasonal variations that are crucial for both residents and visitors to consider. From January to February, the UV Index remains in the moderate category (3-5) with a burn time of 30 minutes, indicating relatively lower risk. However, as spring approaches, March brings an increase to a high index of 7, necessitating caution with a reduced burn time of 25 minutes. The most critical months for UV exposure occur from April to June, where the index peaks at 11, categorized as extreme and resulting in a burn time of just 10 minutes. July and August maintain similar high levels, followed by a slight decline in September (9). As the year winds down, the UV risk lessens, with October returning to high levels (7) and burn time increasing to 25 minutes, before settling back to moderate levels by year’s end in November and December. Visitors and residents are advised to take extra precautions during the high-risk months of April to September, including using sunscreen, wearing protective clothing, and seeking shade, especially during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chicago UVI | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Brooklyn UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| New York City UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| Vienna | 3 | 5 | 7 | 10 | 11 | 11 | 10 | 10 | 9 | 7 | 5 | 3 |
| Los Angeles UVI | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |