UV Index in Stonybrook, United States

Last updated: May 3, 2025

Understanding the UV Index is essential for residents of Stonybrook, United States, as it plays a crucial role in safeguarding your skin health and preventing sunburn. With our climate categorized as Cfa, Stonybrook experiences considerable UV exposure, especially during midday hours when levels peak at 10. By familiarizing yourself with the daily UV fluctuations—from a low 1 in the early morning to an alarming 9 around noon—you can take proactive measures to protect yourself and enjoy the sunshine safely. Stay informed to keep your skin healthy and vibrant!

Hourly UV Index in Stonybrook

At 07:00 AM, the UV Index starts off mild at 1, making it a safe time to enjoy the morning light. As the day progresses, the sun climbs higher, and by 10:00 AM, the index jumps to 6, signaling a notable increase in solar intensity. The peak of the day arrives at 01:00 PM, with a strong UV Index of 10—perfect for sun protection or seeking shade. Following this zenith, the index gradually declines, reaching 9 at 02:00 PM and tapering off to 3 by 05:00 PM, where it's still wise to stay cautious. As evening approaches, the UV Index drops further to 1 by 07:00 PM, allowing for a relaxed end to the day. Remember to stay safe and protect your skin during the most intense daylight 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	3	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	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 Stonybrook

Throughout the year, UV exposure varies significantly, peaking during late spring and summer months. High-risk months for UV exposure are April through September, where the UV Index frequently reaches levels classified as very high; particularly notable are May, June, and July, when it consistently hits a maximum of 10. Visitors and residents are advised to take precautions during these months, with burn times dramatically reduced to as little as 15 minutes. In contrast, January, February, and November present moderate UV levels, and December has a low index, making sun safety measures less critical during these months. To protect against skin damage, it is essential to wear sunscreen, seek shade, and wear protective clothing, especially between peak months of April and September.

Monthly Maximum UV Index for Stonybrook, United States

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

The table above highlights how UV exposure in Stonybrook 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.

Stonybrook'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
Stonybrook	3	5	6	9	10	10	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