UV Index in Bellevue, United States

Last updated: July 2, 2025

Understanding the UV Index in Bellevue, United States, is crucial for protecting your skin and overall health. With varying levels of UV exposure throughout the day—reaching a maximum of 10 during midday hours—being aware of the UV readings can help prevent painful sunburns and long-term skin damage. Bellevue, situated in a Dfa climate zone, experiences diverse weather patterns that can amplify UV risk, especially in the summer months. By monitoring the UV Index, you can make informed decisions about outdoor activities and ensure you enjoy the beautiful Pacific Northwest while keeping your skin safe from harmful rays.

Hourly UV Index in Bellevue

The UV Index data unveils a dynamic progression of sun intensity throughout the day. Starting low at 1 at 07:00, the index gradually escalates, reaching maximum levels of 10 between 12:00 and 14:00. This peak signals a critical time for sun protection. As the afternoon wanes, the index tapers off to 8 at 15:00, and then descends further to 3 by 17:00, and 2 by 18:00. Ultimately, the day concludes softly with a return to 1 at 19:00. It's essential to stay vigilant during those peak hours to safeguard your skin while enjoying the sun!

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	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Bellevue

Throughout the year, the UV Index exhibits significant seasonal changes, peaking during the summer months. Between April and September, the UV Index consistently registers in the very high to extreme categories, with June reaching the highest level of 11, indicating an enhanced risk for skin damage. The high-risk months are March through September, where burn times drastically decrease—from 25 minutes in March to just 10 minutes in June. Residents and visitors are advised to take precautionary measures during these periods, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade, especially during midday hours when UV exposure is at its peak. During the cooler months, particularly December with a UV Index of 2, the risk decreases significantly, offering a safe window for outdoor activities without intense sun precautions.

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	7	8	9	11	10	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