UV Index in Eureka, United States

Last updated: May 3, 2025

In Eureka, United States, being aware of the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels helps you take proactive measures against sunburn and long-term skin damage, especially as the sun's intensity peaks during midday hours. With a Dfb climate, Eureka experiences distinct seasons that can elevate UV exposure, particularly in summer. As UV levels rise to 8 around noon, it’s vital to stay informed and protect yourself from harmful rays—your skin will thank you!

Hourly UV Index in Eureka

As the sun rises, the UV Index begins its gentle ascent, starting at a low 1 at 07:00 and maintaining that level until 09:00. With the sun climbing higher, it reaches a moderate 2 by 09:00, but things really heat up at 10:00 with a jump to 4. The peak UV exposure occurs between 12:00 and 14:00, where it hits a striking 8, signaling the need for sun protection. Following this intense period, it gradually tapers off, dropping to 7 at 15:00, and continuing down to 4 by 17:00. As the day winds down, the UV Index returns to a low 1 by 19:00, marking the end of the UV cycle. Remember, during those peak hours, it’s crucial to stay protected from those harmful rays!

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	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	6	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 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, 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.

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
Eureka	2	3	5	7	8	9	9	9	7	4	2	1
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