UV Index in Somerville, United States

Last updated: June 2, 2025

Understanding the UV Index is essential for residents of Somerville, United States, as it serves as a crucial indicator of the potential for harmful ultraviolet radiation exposure. With UV levels peaking at 11 around noon, awareness of these fluctuations can help prevent sunburn and promote long-term skin health. Somerville's Cfa climate brings warm summers that increase UV exposure risks, making it vital for individuals to check the daily UV Index and take appropriate precautions, such as seeking shade, wearing protective clothing, and applying sunscreen. By staying informed, you can enjoy the sunny days while protecting your skin from UV damage.

Hourly UV Index in Somerville

As the day unfolds, the UV Index begins low in the morning, peaking sharply around 12:00 PM with a striking 11. From there, it maintains a high level, reaching a maximum of 12 at 1:00 PM, before gradually falling as the afternoon progresses. By 3:00 PM, it dips to 9, signaling a decline in intensity. As evening approaches, the index returns to a more manageable 2 by 6:00 PM, ultimately settling at 1 as the sun sets. Remember to protect your skin, especially during those peak hours when the UV intensity reaches its highest levels!

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	1	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	7	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Somerville

Throughout the year, UV index levels exhibit significant seasonal changes, with the highest risk occurring from March to September. The months of April, May, June, and July all reach an extreme UV index of 11 or 12, necessitating a burn time of just 10 minutes. Visitors and residents should take extra precautions during these high-risk months by wearing protective clothing, applying sunscreen regularly, and seeking shade during peak sun hours. Conversely, January and December are classified as moderate with a UV index of 5, allowing for longer exposure times of 30 minutes, while February and October present very high UV index levels. It's essential to remain vigilant year-round, but particularly during the peak summer months, to safeguard against harmful UV radiation.

Monthly Maximum UV Index for Somerville, United States

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

The table above highlights how UV exposure in Somerville 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.

Somerville'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
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Somerville	5	8	9	11	11	12	12	11	11	8	6	5
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5