UV Index in Stonington, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Stonington, United States, as it provides essential information on sun exposure and skin health. With the potential for harmful effects such as sunburn and long-term skin damage, awareness of UV levels helps you take necessary precautions, especially during peak hours. The climate in Stonington, characterized as Dfa, typically experiences moderate to high UV exposure, particularly between 10 AM and 2 PM when the index peaks at 11. Being informed about these levels empowers you to enjoy the sun safely while protecting your skin.

Hourly UV Index in Stonington

The UV Index steadily climbs as the day progresses, starting from a mild 1 at 7:00 AM and reaching a peak of 11 by 1:00 PM. Sun-seekers and outdoor enthusiasts should be mindful, as the index hits a high of 10 at 12:00 PM, signaling significant UV exposure. After this peak, the index gradually decreases, dropping to 8 by 3:00 PM, and continuing to decline to 1 by 7:00 PM. For safe sun enjoyment, it’s best to take precautions during those high UV hours, particularly between 11:00 AM and 2:00 PM. Remember to sport your hats and 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	9	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 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 Stonington

Throughout the year, the UV Index exhibits notable seasonal changes, with high-risk months typically occurring from April to August. In these months, the UV Index reaches its peak at 11, indicating an extreme exposure category, particularly in June and July where burn time is reduced to just 10 minutes. Visitors and residents should take extra precautions during this period, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade, especially from midday to early afternoon when UV radiation is strongest. As summer transitions into fall, the UV Index gradually decreases, with moderate levels seen from November to March, allowing for safer outdoor activities during these months. Being aware of these variations can help individuals enjoy the outdoors while minimizing the risk of UV-related health effects.

Monthly Maximum UV Index for Stonington, United States

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

The table above highlights how UV exposure in Stonington 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.

Stonington'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
Stonington	3	5	6	9	10	11	11	9	8	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