UV Index in Winchester, United States

Last updated: June 2, 2025

Understanding the UV Index in Winchester, United States is essential for protecting your skin and overall health. As UV levels can reach a peak of 11 during the midday hours, awareness of these fluctuations is crucial for preventing sunburn and long-term skin damage. The climate in Winchester, characterized as Cfa, brings warm summers and moderate UV exposure, emphasizing the need for vigilance in protecting oneself from harmful rays. By keeping track of the UV Index, you can enjoy the beautiful outdoors while safeguarding your skin and well-being.

Hourly UV Index in Winchester

The UV Index for the day showcases a striking pattern, starting moderate at 7:00 AM with a value of 1. As the sun climbs higher, the index steadily rises, hitting 3 by 9:00 AM, and then surging to a peak of 11 between 1:00 PM and 2:00 PM. This indicates a high risk of harm from unprotected sun exposure during midday. Following the peak, the UV Index gradually declines to 4 by 5:00 PM and further decreases to 1 by 7:00 PM, emphasizing the critical importance of sun protection during the intense midday hours. It’s advisable to seek shade and wear sunscreen if you're outside during the peak period!

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	10	very high	15 min
13:00	11	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 Winchester

Throughout the year, UV exposure varies significantly, with high-risk months primarily occurring from April to September. The UV Index peaks during June and July at 11, indicating an extreme risk of harm from unprotected sun exposure, where burn time is as short as 10 minutes. Early spring begins with moderate levels in January (UV Index 4) and escalates to very high levels in April (UV Index 10). As the summer progresses, residents and visitors should be especially cautious during peak hours, practicing sun safety measures such as wearing sunscreen, protective clothing, and seeking shade to reduce risk. As autumn approaches, UV levels decrease, dropping back to moderate levels by December, making it safer for prolonged outdoor activities.

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	4	6	7	10	10	11	11	10	9	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