UV Index in Oakley, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Oakley, United States, especially given its Dfb climate zone, which can lead to increased sun exposure. The UV levels in Oakley can peak dramatically, with afternoon indexes reaching as high as 12, indicating a very high risk of harm from unprotected sun exposure. Being aware of these levels is essential for sunburn prevention and maintaining skin health; even brief exposure during peak hours can increase your risk of skin damage. Stay informed and protect yourself from the sun’s harmful rays by checking the UV Index regularly and taking appropriate precautions!

Hourly UV Index in Oakley

As the sun rises, the UV Index begins its ascent, reaching 1 by 07:00. By 08:00, it climbs to 2, signaling the start of the day’s UV exposure. Things heat up quickly, reaching 4 at 09:00 and then jumping to 6 by 10:00. The intensity peaks dramatically at 12:00, hitting 11, and just an hour later, 13:00, it reaches its maximum of 12. This high level continues until 14:00, where it remains steady. As the afternoon progresses, the UV Index begins to decline: jotting down to 10 at 15:00, then 8 at 16:00, and tapering off to 5 by 17:00. By the evening hours, it gently reduces to 3 at 18:00 and settles back to 1 by 19:00. This cycle underscores the importance of sun safety during peak hours, especially between 11:00 and 14:00 when UV exposure is at its strongest.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:002low45 min
09:004moderate30 min
10:006high25 min
11:009very high15 min
12:0011extreme10 min
13:0012extreme10 min
14:0012extreme10 min
15:0010very high15 min
16:008very high15 min
17:005moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Oakley

Throughout the year, the UV Index exhibits significant seasonal changes, with the highest levels typically occurring from April to August. During this period, the UV Index peaks at 12, indicating an extreme risk of harm from unprotected sun exposure, with a critical burn time of only 10 minutes. Consequently, March and September also represent high-risk months, with UV Index readings of 8 and 10, respectively, necessitating increased caution. As such, visitors and residents should prioritize sun protection strategies during these months—such as wearing sunscreen, protective clothing, and seeking shade during peak sunlight hours. Conversely, the winter months, particularly January, November, and December, feature lower UV levels categorized as moderate, allowing for relatively safer sun exposure, albeit still with care.

Monthly Maximum UV Index for Oakley, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Oakley. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec468111212121110753
Data source: Statistical UV Index data for Oakley, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Oakley UV Index with Other United States Cities

The table above highlights how UV exposure in Oakley compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Oakley's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Oakley468111212121110753
Houston UVI589111112121110975