UV Index in Greenfield, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Greenfield, United States, where the risk of harmful sun exposure can vary significantly throughout the day. With peak UV levels reaching 11 around noon, awareness of UV ratings is essential in preventing sunburn and maintaining long-term skin health. The Csb climate of Greenfield, characterized by moderate temperatures and varying sun intensity, means that protecting your skin from UV rays is not just important during the summer months, but year-round. Stay informed and safeguard your well-being by keeping an eye on the UV Index!

Hourly UV Index in Greenfield

The UV Index today showcases a striking climb in intensity as the sun rises, starting from a modest 1 at 7:00 AM. As the morning unfolds, the index steadily elevates, reaching 4 by 9:00 AM before peaking at a blistering 12 at 1:00 PM—the most dangerous time for exposure. The afternoon shows a slight decline, with values tapering from 11 at 2:00 PM back down to 1 by 7:00 PM. This fluctuation highlights the importance of being sun-smart, especially during the peak hours when the risk of harmful UV radiation is at its highest. Remember to protect your skin and seek shade if you'll be outdoors!

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	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	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 Greenfield

Throughout the year, UV exposure varies significantly, with the high-risk months typically occurring from March to August. During this period, UV Index levels reach very high to extreme, particularly in May and June, when the UV Index peaks at 12. This translates to a very short burn time of just 10 minutes, emphasizing the need for precaution. As spring transitions to summer, residents and visitors should be especially vigilant about sun protection, employing strategies such as wearing sunscreen, protective clothing, and seeking shade, particularly during midday hours. While UV levels drop in the fall and winter, with months like October and December showing a moderate risk, it's still advisable to remain mindful of sun exposure year-round.

Monthly Maximum UV Index for Greenfield, United States

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

The table above highlights how UV exposure in Greenfield 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.

Greenfield'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
Greenfield	4	5	8	9	11	12	12	11	9	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5