Last updated: June 2, 2025
Understanding the UV Index in Foresthill, United States, is essential for protecting your skin and maintaining long-term health. With its sunny climate typical of a Csa zone, Foresthill experiences varying UV levels throughout the day, peaking at an intense 12 around noon. This means that awareness of UV levels is crucial for sunburn prevention and skin health, especially in the summer months when outdoor activities are at their highest. By staying informed about the UV Index, residents can enjoy the beautiful surroundings of Foresthill while minimizing their risk of harmful UV exposure.
Throughout the day, the UV Index displayed a dynamic pattern, peaking at an intense 12 around 1 PM. Starting off gently at 1 by 7 AM, it climbed steadily, reaching 9 by 11 AM, a clear sign to take precautions. As the sun approached its zenith, the index swelled to its maximum at 12 PM, emphasizing the importance of sun safety. Following the midday peak, the index gradually decreased, dropping to 9 by 3 PM, then tapering off further to 2 by 6 PM and 1 by 7 PM. This data underscores the significance of shielding oneself from the sun's harmful rays during the day, especially when the UV Index is at its highest.
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal variation, with high-risk months typically occurring from March to August. During this period, peak UV Index values reach 11 in May and June, categorizing these months as extreme, where sensitive individuals can burn in just 10 minutes. March and April see very high levels (UV Index 8 and 9), reducing safe exposure times to 15 minutes. As summer transitions to fall, September and October remain relatively high at 9 and 7, respectively, allowing for burn times of 15 and 25 minutes. Conversely, the winter months of January, February, November, and December report moderate levels (UV Index 3 to 5), with burn times of 30 minutes. Visitors and residents should take these variations into account, especially during high-risk months; protection against UV exposure—such as wearing sunscreen, hats, and protective clothing—is strongly recommended to minimize skin damage.
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 |
| Foresthill | 3 | 5 | 8 | 9 | 11 | 12 | 11 | 10 | 9 | 7 | 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 |