UV Index in Bellevue, United States

Last updated: May 3, 2025

In Bellevue, Washington, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn, especially during those long summer days. Understanding the UV levels can empower residents to take appropriate precautions, safeguarding their skin from harmful ultraviolet rays. With Bellevue's climate characterized as Dsb, visitors and locals alike should be mindful of fluctuating UV exposure, which can peak at a notable 11 around midday. By staying informed about the UV Index, you can enjoy the beautiful outdoors while prioritizing your well-being!

Hourly UV Index in Bellevue

The UV Index throughout the day presents a striking pattern that underscores the importance of sun protection. Starting from a modest 1 at 07:00, the index gradually climbs, reaching 2 by 08:00. A noticeable rise occurs as the day progresses, peaking at a blistering 11 between 13:00 and 14:00—the critical hours when UV exposure is at its highest. After this zenith, the index gracefully tapers down, showcasing 10 at 15:00, followed by a decline to 5 by 17:00. As evening approaches, values drop dramatically to 3 by 18:00, and finally, the day concludes with a safe 1 at 19:00. This data clearly highlights the importance of taking precautions during peak hours to safeguard against harmful UV 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	2	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	11	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in Bellevue

Throughout the year, UV levels fluctuate significantly, with March through September marked as high-risk months. During this period, the UV Index peaks, reaching an extreme level of 11 or higher in May, June, and July, where even brief exposure can lead to burns in just 10 minutes. The earlier spring months of March and April present a very high risk as well, requiring caution with a burn time of only 15 minutes. Conversely, the winter months of January, February, November, and December feature a moderate UV Index (3-5) with safer burn times of 30 minutes or more. To ensure safety, visitors and residents are advised to wear sunscreen, protective clothing, and seek shade during peak UV hours, especially from late spring to late summer.

Monthly Maximum UV Index for Bellevue, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Bellevue. 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 Bellevue, 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 Bellevue UV Index with Other United States Cities

The table above highlights how UV exposure in Bellevue 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.

Bellevue'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
Bellevue	3	5	8	9	11	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