Last updated: July 2, 2025
Understanding the UV Index in Star Valley, United States is vital for protecting your skin and overall health. As sunburn can occur in just 15 minutes under high UV levels, being aware of the daily fluctuations in UV exposure helps you take necessary precautions. Star Valley's Csa climate brings plenty of sunshine, making it crucial to monitor UV intensity, especially during peak hours when the index reaches levels as high as 12. Stay informed and keep your skin safe while enjoying the beautiful outdoors!
As the sun rises, the UV Index begins to climb, starting at a minimal 1 at 07:00. By 08:00, it reaches 3, heralding the day’s increasing intensity. The real peak occurs between 11:00 and 13:00, where it hits a blistering 12, indicating the perfect time for sun protection. The index gradually declines after 14:00, dropping to 8 at 15:00, and then gently settles down to 1 by 18:00, reflecting the waning sunlight. It's essential to stay aware of these hourly fluctuations to safeguard your skin against harmful UV rays throughout the day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index displays significant seasonal variations that highlight periods of increased sun exposure risk. The high-risk months for UV exposure are primarily from March to August, peaking in June with an extreme UV Index of 13. During these months, the recommended burn time is as short as 10 minutes, indicating the necessity for diligent sun protection. Residents and visitors should be especially cautious during these peak months, utilizing sunscreen, wearing protective clothing, and seeking shade whenever possible. In contrast, the UV Index begins at a moderate level in January and December, allowing for longer exposure times of 30 minutes. Awareness of these seasonal changes and adherence to sun safety guidelines can significantly reduce the risk of harmful UV exposure.
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 |
| 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 |
| Star Valley | 4 | 7 | 9 | 11 | 12 | 13 | 12 | 11 | 11 | 8 | 6 | 5 |