UV Index in Winchester, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Winchester, United States. As the sun rises higher in the sky, its harmful ultraviolet radiation can lead to sunburns and long-term skin damage, making awareness essential for sun safety. The UV Index in Winchester peaks at 10 during midday hours—reflecting the area’s typical Dfb climate that can present significant UV exposure risks during warmer months. By staying informed about UV levels, you can better protect your skin and enjoy the sun safely.

Hourly UV Index in Winchester

The hourly UV Index data reveals a dynamic shift in sun intensity throughout the day, starting from a gentle 1 at 07:00, ideal for morning strolls. As the sun rises higher, the index escalates, peaking at a potent 10 between 12:00 and 13:00. This mid-day surge emphasizes the need for sunscreen and protective gear, as the risk of harm from UV rays increases significantly. By 15:00, the index begins to decline, settling at 7 before tapering off further to a mere 1 by 19:00, signaling a safe reprieve for evening outdoor activities. Stay aware and protect your skin during those peak hours!

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	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	9	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	3	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 levels fluctuate significantly, with high-risk months generally spanning from April to August. During this period, particularly in May and June, the UV Index peaks at 10, indicating a very high risk of harm from unprotected sun exposure, with a rapid burn time of just 15 minutes. Comparatively, the UV Index is moderate in the winter months of January to March, and again in October and November, where the burn time extends to 30 minutes. As the year progresses into December, the UV risk decreases further, classified as low, allowing for a safer 45-minute exposure before burning. Visitors and residents are advised to be vigilant in the spring and summer months, taking necessary precautions such as applying sunscreen, wearing protective clothing, and seeking shade during the peak sun hours to minimize the risks of skin damage.

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
Winchester	3	4	5	8	9	10	10	9	7	5	3	2
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
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5