Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Star Valley Ranch. With UV levels peaking around 11 during midday, awareness is key to preventing sunburn and protecting skin health. The unique Dfc climate of Star Valley Ranch brings varied weather conditions, but the risk of overexposure to harmful UV rays remains a constant threat. Knowing the UV Index helps you make informed decisions about outdoor activities, ensuring you can enjoy the stunning landscape safely while keeping your skin protected.
The UVI hourly data reveals a dynamic pattern throughout the day, peaking at 12 PM with a formidable UV Index of 10. As the morning sun rises, the UV Index gradually climbs from a mere 1 at 7 AM to a moderate 3 by 9 AM. The intensity escalates sharply, reaching 8 by 11 AM and hitting its zenith at 11 between 1 PM and 2 PM. Following this peak, there's a noticeable decline, as the index eases to 9 at 3 PM, then gradually drops to 5 by 5 PM, tapering off to 2 by 6 PM before settling back to 1 as evening approaches. This data underscores the importance of sun protection from late morning to early afternoon when UV exposure is at its highest.
| 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal changes, with notable increases from early spring through summer. March marks the transition to a very high risk of UV exposure, peaking in May and June with an extreme classification where the burn time is as little as 10 minutes. July and August maintain this intensity, emphasizing the importance of sun protection. Visitors and residents should stay vigilant during these high-risk months of March to August, taking precautions such as wearing sunscreen, protective clothing, and seeking shade to minimize the risk of skin damage. As the seasons shift into October and November, UV risks decrease, transitioning back to moderate levels with longer burn times, providing a safer environment for outdoor activities.
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 |
| Star Valley Ranch | 3 | 5 | 8 | 10 | 11 | 12 | 11 | 11 | 9 | 6 | 4 | 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 |