UV Index in Eureka, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Eureka, United States, where the sun can be deceptively strong, especially during peak hours. With a typical climate characterized by cold winters and mild summers, Eureka experiences varying UV exposure levels, often peaking at 9 during midday. Being aware of these UV levels is vital for preventing sunburn and protecting your skin health. By keeping an eye on the UV Index, you can enjoy the outdoors while safeguarding yourself against harmful effects, ensuring that your time in the sun remains safe and enjoyable.

Hourly UV Index in Eureka

The UV Index for the day presents a fascinating snapshot of solar intensity. Starting off gently at 1 during the early hours of 7:00 and 8:00, the sun gradually gains strength, peaking at a robust 9 between 13:00 and 14:00. This period marks the day's highest UV exposure, making it crucial for sun protection. Notably, the intensity begins to taper off after 15:00, descending to 3 by 18:00, and finally closing the day at 2 by 19:00. It's a clear reminder of the day's rhythm: with the sun rising high, the midday hours demand caution, while the early mornings and evenings offer a more gentle embrace of sunlight.

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
08:001low45 min
09:003moderate30 min
10:004moderate30 min
11:006high25 min
12:008very high15 min
13:009very high15 min
14:009very high15 min
15:008very high15 min
16:007high25 min
17:005moderate30 min
18:003moderate30 min
19:002low45 min

Monthly UV Index Trends in Eureka

Throughout the year, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk. The high-risk months are from May to August, where the UV Index reaches a peak of 9, categorized as very high, with a burn time of just 15 minutes. April also poses a risk with a high UV Index of 7, suggesting a burn time of 25 minutes. Conversely, the months of January, November, and December show a low risk with UV indices of 2 and 1, allowing for extended exposure times of up to 45 minutes. Visitors and residents are advised to take extra precautions during the high-risk months by wearing sunscreen, protective clothing, and seeking shade during peak hours, while enjoying the sun responsibly in the milder months.

Monthly Maximum UV Index for Eureka, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Eureka. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235789987421
Data source: Statistical UV Index data for Eureka, 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 Eureka UV Index with Other United States Cities

The table above highlights how UV exposure in Eureka 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.
Eureka's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Eureka235789997421
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Houston UVI589111112121110975