Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Oakley, United States, where the sun's rays can be particularly intense, especially during peak hours. With a Cfa climate, Oakley experiences warm summers that can significantly elevate UV exposure levels, making it essential to stay informed. Monitoring these levels is vital for preventing sunburn and promoting overall skin health. For instance, the UV Index peaks at 11 between 1 PM and 2 PM, indicating a high risk for harm from unprotected sun exposure. By being proactive and aware of the UV Index, you can enjoy the beautiful Oakley weather while protecting yourself from potential risks.
As the sun rises, the UV Index remains relatively low, starting at a gentle 1 from 07:00 to 09:00. However, as the day progresses, the UV levels ramp up significantly, reaching a moderate 5 by 10:00 and hitting a peak of 11 between 13:00 and 14:00. This period signifies the highest risk, urging outdoor enthusiasts to take precautions. By 15:00, the index starts to dip to 10, followed by a gradual decline to 5 at 17:00, and settling at 2 by 19:00. It's a clear reminder that during midday, when the sun is at its strongest, the need for protection is paramount to safeguard against harmful UV radiation. Enjoy the sunshine, but don't forget your sunscreen! ☀️
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits notable seasonal variations, with high-risk months typically occurring from March to September. During these months, the UV Index escalates to levels categorized as high (7), very high (8-10), and extreme (11-12), particularly peaking in June with an Index of 12, indicating an urgent need for protective measures. Burn times drastically reduce to as low as 10 minutes in the peak summer months, underscoring the importance for residents and visitors to prioritize sun safety. As a precaution, it is advisable to limit sun exposure during these high UV periods, especially between the hours of 10 AM and 4 PM. During lower risk months, notably January, February, and December, UV levels remain moderate, allowing for safer outdoor activities, though sun protection is still recommended as UV rays can cause cumulative skin damage over time.
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 |
| Oakley | 4 | 5 | 7 | 9 | 10 | 12 | 11 | 10 | 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 |