UV Index in Cambridge, United States

Last updated: May 3, 2025

Understanding the UV Index in Cambridge, United States is essential for maintaining healthy skin and preventing sunburn, especially as the sun's intensity peaks during the summer months. With the unique Dfa climate that features humid summers and cold winters, residents face varying UV exposure levels throughout the year. From a moderate 1 at sunrise to a peak of 9 between noon and 1 PM, knowing the UV index helps you take proactive measures—like applying sunscreen and wearing protective clothing—during those critical hours to safeguard your skin’s health against harmful UV radiation. Stay informed and protect your skin in Cambridge!

Hourly UV Index in Cambridge

The UV Index throughout the day paints a clear picture of sun intensity, peaking at 12:00 PM with a striking 9—an indicator that protective measures are essential. The morning starts gently, rising from 1 at 07:00 to 4 by 09:00. As the day progresses, it reaches its zenith at 11:00 AM with a 7, followed closely by a strong 8 at 2:00 PM. Post-peak, the UV levels begin to dip, ending the day with more manageable figures: 3 at 5:00 PM, and gracefully falling back to a 1 by 7:00 PM. It's a day that reminds us to enjoy the sunshine while staying safe!

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	7	high	25 min
12:00	9	very high	15 min
13:00	9	very high	15 min
14:00	8	very high	15 min
15:00	6	high	25 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Cambridge

Throughout the year, the UV Index shows significant seasonal changes that impact sun safety for residents and visitors. From April to September, the UV Index peaks, reaching levels as high as 10 in the summer months of June and July. This indicates a very high exposure category, with a reduced burn time of only 15 minutes during these months. Conversely, during the winter months of December through February, the UV Index is considerably lower, ranging from 2 to 4, with a burn time of 30 to 45 minutes. Therefore, visitors and residents should be especially cautious during the high-risk months of April to September, and take appropriate protective measures, such as wearing sunscreen, protective clothing, and seeking shade, to minimize their risk of UV exposure.

Monthly Maximum UV Index for Cambridge, United States

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

The table above highlights how UV exposure in Cambridge 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.

Cambridge'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
Cambridge	3	4	5	8	9	10	10	9	8	5	3	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