UV Index in Greenfield, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Greenfield, as it provides essential insights into daily sun exposure and its potential impacts on skin health. With the UV levels often soaring to a maximum index of 11 during midday, awareness can play a vital role in preventing sunburn and long-term skin damage. Greenfield’s Csb climate delivers a unique mix of sunshine and cooler summers, but the risk of harmful UV exposure remains significant, especially when the sun is at its peak. By staying informed about UV levels, you can safeguard your skin and enjoy the outdoors responsibly.

Hourly UV Index in Greenfield

The UV Index steadily climbs as the day progresses, starting from a mild 1 at 7:00 AM and reaching a peak of 11 by 1:00 PM. Sun-seekers and outdoor enthusiasts should be mindful, as the index hits a high of 10 at 12:00 PM, signaling significant UV exposure. After this peak, the index gradually decreases, dropping to 8 by 3:00 PM, and continuing to decline to 1 by 7:00 PM. For safe sun enjoyment, it’s best to take precautions during those high UV hours, particularly between 11:00 AM and 2:00 PM. Remember to sport your hats and 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	9	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	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