UV Index in Northfield, United States

Last updated: June 2, 2025

In Northfield, United States, staying informed about the UV Index is essential for protecting your skin and promoting overall health. Understanding UV levels helps prevent sunburn and long-term skin damage, allowing you to enjoy the outdoors safely. With a Dfa climate, Northfield experiences varied UV exposure throughout the day, peaking dramatically from late morning to early afternoon. During these hours, UV levels can reach as high as 10, indicating a significant risk for unprotected skin. By being aware of these levels, you can take proactive measures to shield yourself from harmful UV radiation while enjoying the beautiful outdoors.

Hourly UV Index in Northfield

The UV Index throughout the day showcases a notable rise, peaking at an impressive 10 between 1 PM and 2 PM. Starting from a mild 1 at 7 AM, sun lovers can expect a steady ascent, reaching 9 by noon. As the afternoon sun intensifies, the index holds a robust 10, signaling extreme UV exposure, before gradually tapering off to 4 by 5 PM and descending further to 1 by 7 PM. It's a classic reminder to stay protected during those peak hours, especially between 11 AM and 3 PM, when the sun's rays are most potent. Enjoy the sunshine, but don’t forget your 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	8	very high	15 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	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 Northfield

Throughout the year, the UV Index experiences significant fluctuations, particularly from spring through summer. High-risk months for UV exposure are from April to September, where the UV Index peaks at 10 in June and July, indicating a very high exposure category with a burn time of only 15 minutes for unprotected skin. In contrast, the winter months of December and January present lower levels, with UV Index values of 2 and 3 respectively, allowing for longer burn times of 45 and 30 minutes. Visitors and residents are strongly advised to take precautions during high-risk months by wearing protective clothing, applying sunscreen regularly, and seeking shade when outdoors, especially during peak sun hours.

Monthly Maximum UV Index for Northfield, United States

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

The table above highlights how UV exposure in Northfield 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.

Northfield'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
Northfield	3	5	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