UV Index in Chatham, United States

Last updated: June 2, 2025

Understanding the UV Index in Chatham, United States is essential for safeguarding your skin and overall health. With UV levels peaking at 10 during midday hours, awareness can help you prevent sunburn and long-term skin damage. Chatham's humid subtropical climate (Cfa) brings its own set of UV exposure risks, making it crucial to keep an eye on daily UV levels. By familiarizing yourself with the UV Index, you empower yourself to enjoy the outdoors responsibly while protecting your skin from harmful rays.

Hourly UV Index in Chatham

As the sun rises, the UV Index begins to climb, starting at a modest 1 by 7:00 AM. By 8:00 AM, it has tripled, reaching 3, and continues its ascent to 4 at 9:00 AM. The peak intensity hits between 12:00 PM and 1:00 PM, where the UV Index soars to an intense 10—an indication of strong sun exposure. The afternoon sees a gradual decline, with values of 9 at 2:00 PM and 7 by 3:00 PM, showing that even later in the day, caution is advised. As the sun begins to set, the UV Index drops back down to 1 by 6:00 PM, making the daylight hours the most critical for sun protection. Stay safe and smart under 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	3	moderate	30 min
09:00	4	moderate	30 min
10:00	7	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	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 Chatham

Throughout the year, UV index levels fluctuate significantly, with notable increases during the warmer months. January and February experience a moderate UV index of 3 and 4, allowing for a 30-minute burn time under the sun. As the seasons transition into March and onward, the risk escalates, peaking in June and July with a maximum UV index of 10—classifying these months as high-risk. During these summer months, individuals are advised to limit sun exposure to just 15 minutes to prevent skin damage. The trend continues with August and September maintaining high levels (UV index of 9 and 8 respectively) before tapering off in October (UV index 6) and returning to moderate levels in November and December (UV index of 4 and 2). Residents and visitors should prioritize sun protection, especially during the peak months of April through September.

Monthly Maximum UV Index for Chatham, United States

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

The table above highlights how UV exposure in Chatham 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.

Chatham'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
Chatham	3	4	6	8	9	10	10	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