UV Index in Winchester, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Winchester, United States, as it informs us about the sun's intensity and helps in making informed decisions for our skin health. With UV levels peaking at 12 in the afternoon, awareness is key to preventing sunburn and long-term skin damage. Living in a BWk climate zone, Winchester experiences varying UV exposure throughout the year, emphasizing the need for vigilance against potential risks, especially during those sunlit hours. Stay protected and enjoy the outdoors safely by keeping an eye on the UV Index!

Hourly UV Index in Winchester

Throughout the day, the UV Index (UVI) experiences a notable ascent, peaking at 13 around 1:00 PM—a time that signals the highest risk of harm from unprotected sun exposure. Starting the day with a low 1 at 7:00 AM, the UVI climbs steadily, reaching 12 by noon. The intensity wanes post-peak, dropping back to 6 by 4:00 PM, and further decreasing to a mild 1 by 7:00 PM. Those planning outdoor activities should take heed of the peak hours between 11:00 AM and 1:00 PM, where the index hits critical levels, urging the use of sunscreen, hats, and shade to stay safe.

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:002low45 min
09:004moderate30 min
10:007high25 min
11:009very high15 min
12:0011extreme10 min
13:0011extreme10 min
14:0010very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Winchester

The UV Index experiences significant seasonal changes, peaking during the summer months. From January to February, UV exposure rises moderately, but by March and April, it escalates to very high levels, indicating increasing risk. The high-risk months are clearly May, June, July, and August, when the UV Index reaches extreme levels of 11 to 13, resulting in a rapid burn time of just 10 minutes. As summer transitions to fall, the UV Index gradually decreases, becoming moderate by November and December. Visitors and residents are advised to take extra precautions during high-risk months by wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to mitigate the harmful effects of intense UV radiation.

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.
JanFebMarAprMayJunJulAugSepOctNovDec468101112131110753
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.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Winchester468101112131110753
Houston UVI589111112121110975