UV Index in Williamsburg, United States

Last updated: May 3, 2025

In sunny Williamsburg, United States, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding UV levels empowers residents and visitors alike to take proactive measures when enjoying the outdoors. With a Dfb climate, Williamsburg experiences vibrant summers, where UV exposure can peak around midday with levels reaching up to 10—a strong reminder to protect your skin. By keeping an eye on the UV Index, you can enjoy the area's beautiful parks and historical sites while safeguarding your health under the sun.

Hourly UV Index in Williamsburg

The UV Index today showcases a dynamic sun activity that peaks dramatically as the day unfolds. Starting gently at 1 at 07:00, it swiftly climbs to 10 by 13:00, marking the sun's most intense rays during midday. As the afternoon progresses, the index dips, dropping to 5 by 16:00 and settling back to 1 by 19:00 as the sun begins to wane. This rhythm underscores the importance of sun safety: ensure protection during peak hours from 11:00 to 14:00 when the UV index is at its highest! Enjoy the sunshine, but don't forget your sunscreen!

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	9	very high	15 min
13:00	10	very high	15 min
14:00	9	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Williamsburg

Throughout the year, the UV Index experiences notable fluctuations, with high-risk months typically spanning from March to September. In April and May, the Index peaks at 10, indicating a very high exposure category where the burn time is just 15 minutes. Consequently, during these months, it is crucial for both visitors and residents to take precautions such as wearing sunscreen, protective clothing, and sunglasses. The risk slightly diminishes in October with a UV Index of 6, shifting to lower levels by November and December, where the Index falls to 4 and 2, respectively. As the year progresses, individuals are encouraged to adjust their sun safety practices according to these seasonal changes to ensure their skin health remains a priority.

Monthly Maximum UV Index for Williamsburg, United States

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

The table above highlights how UV exposure in Williamsburg 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.

Williamsburg'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
Williamsburg	3	5	6	8	10	10	9	9	8	6	4	2
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