Last updated: July 2, 2025
Understanding the UV Index is essential for residents of Black Diamond, United States, as it plays a crucial role in promoting skin health and preventing sunburn. During the peak hours of sunlight, particularly between 11 a.m. and 2 p.m., the UV levels can reach as high as 11, indicating a very high risk of harm from unprotected sun exposure. With Black Diamond's moderate Cfa climate, the potential for UV radiation to impact your skin is significant, especially during the warmer months. Being aware of the UV Index helps you make informed decisions about outdoor activities and protective measures to safeguard your health.
As the sun rises, the UV Index starts low at 1 at 07:00 and 08:00, perfect for a leisurely morning. By 09:00, it climbs to 3, signaling that it's time to enjoy some shade. The intensity peaks sharply at 12:00 with a maximum index of 10, indicating a high risk of harm from unprotected sun exposure. Continuing at 13:00 and 14:00, the index holds steady at 11, urging caution with the midday sun blazing down. As the afternoon progresses, the UV levels begin to wane, dropping to 7 by 16:00, and further decreasing to 2 by 18:00. Finally, the day winds down with a gentle 1 at 19:00, marking a safe return to outdoor activities as the sun sets. Be sure to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 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 | 10 | 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 |
As the seasons change, so do UV levels, significantly impacting sun safety for visitors and residents. From February to August, the UV Index reaches very high to extreme levels, with the highest readings occurring in April, May, and June (UV Index 11-12). During these months, the burn time drops to as little as 10 minutes, indicating a heightened risk of skin damage. February, March, and September also present high risks (UV Index 8-10), where exposure times require caution. In contrast, winter months like January and December see much lower UV levels (UV Index 5), where the exposure risk is moderate, and burn times can extend to 30 minutes. To minimize sun exposure risks, it is advisable for everyone to use sunscreen, wear protective clothing, and seek shade during peak UV hours, particularly from late morning to mid-afternoon.
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 |
| Black Diamond | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 11 | 10 | 9 | 7 | 5 |