UV Index in Eureka, United States

Last updated: July 2, 2025

Understanding the UV Index in Eureka, United States, is essential for safeguarding your skin and overall health. With peak UV levels reaching as high as 10 during the midday hours, being aware of the UV Index can significantly reduce your risk of sunburn and long-term skin damage. Eureka's Cfa climate offers a unique blend of coastal beauty and mild temperatures, but it also poses distinct exposure risks, making it crucial for locals and visitors alike to stay informed about daily UV levels. By understanding these fluctuations, you can take proactive measures to protect yourself while enjoying the sun-filled days in this stunning coastal town.

Hourly UV Index in Eureka

Today's UV Index presents an intriguing curve, starting the day with a mellow maximum of 1 at 07:00. As the sun climbs higher, things heat up quickly—by 10:00, the index reaches 6, and by 12:00, it peaks at an intense 10. This level remains steady until 14:00, urging sun enthusiasts to take precautions. As the afternoon fades, the UV Index gracefully tapers off, dropping to 4 by 17:00, and finally sinking back to a gentle 1 by 19:00. With mid-day UV levels soaring, it’s crucial to stay protected during those peak hours!

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.
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	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	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

Monthly UV Index Trends in Eureka

Throughout the year, UV levels fluctuate significantly, with the highest risk months occurring from April to September. During this period, UV Index values soar to 9 and above, indicating very high to extreme exposure levels. Specifically, June registers the peak with an Index of 11, presenting a burn time of only 10 minutes. Visitors and residents should exercise caution during these months, seeking shade, wearing protective clothing, and applying sunscreen regularly to safeguard against potential skin damage. In contrast, the lower risk months of January, November, and December see a more moderate UV Index of around 3 to 5, allowing for longer safe exposure times of 30 minutes. Staying informed and adjusting outdoor plans according to these UV index changes is essential for maintaining skin health year-round.

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.

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.
	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
Eureka	3	5	6	9	10	11	10	10	9	7	5	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