UV Index in Winchester, United States

Last updated: June 2, 2025

Understanding the UV Index in Winchester, United States is crucial for protecting your skin and overall health. The UV Index provides vital information about the sun's intensity, helping residents and visitors gauge the risk of sunburn throughout the day. With peak UV levels reaching an intense 10 around midday, it’s essential to take precautions during the spring and summer months when the Cfa climate zone exposes locals to higher UV risks. By staying informed about UV levels, you can enjoy the beautiful outdoors while safeguarding your skin against harmful effects.

Hourly UV Index in Winchester

The UV Index reveals a dynamic ascent and descent throughout the day, peaking with intensity during midday. Starting at a gentle 1 at 7:00 AM, it climbs steadily, reaching 10 by 1:00 PM and maintaining this highest level until 2:00 PM. This critical window indicates significant sun exposure, and it’s essential to take precautions. As the afternoon progresses, the index begins to taper off, dropping to 8 at 3:00 PM, then gradually falling to 1 by 7:00 PM. This data highlights the importance of being sun-smart during the peak hours to minimize UV exposure risks.

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	3	moderate	30 min
10:00	5	moderate	30 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 Winchester

Throughout the year, UV exposure varies significantly, with the highest risk months being April through September, when the UV Index consistently falls within the very high category (10) for most of this period. March marks a transition into high exposure (UV Index 7), while October sees a decrease back to high levels. The moderate exposure months are January, February, November, and December, where burn times are longer, allowing for more extended safe exposure, specifically 30 minutes in January, February, November, and December, and 25 minutes in October. To protect against UV radiation, it is essential for visitors and residents alike to adjust their sun safety practices during the high-risk months. This includes seeking shade, wearing protective clothing, applying sunscreen with a high SPF, and limiting sun exposure during peak hours.

Monthly Maximum UV Index for Winchester, United States

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

The table above highlights how UV exposure in Winchester 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.

Winchester'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
Winchester	3	5	7	10	10	10	10	10	8	7	5	3
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