UV Index in Sumner, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Sumner, United States, as it plays a vital role in protecting your skin from the harmful effects of sun exposure. High UV levels can lead to painful sunburns and long-term skin health issues, making it essential to stay informed about daily UV readings. With Sumner's Cfa climate, characterized by warm summers and varying UV exposure throughout the day, knowing when to seek shade or apply sunscreen can greatly enhance your outdoor experience. Keep an eye on the UV Index to help safeguard your skin while enjoying the beautiful weather this town has to offer!

Hourly UV Index in Sumner

The UV Index throughout the day showcases a dynamic pattern of sun exposure, peaking during the afternoon. At 07:00, the index starts low at 1, gradually increasing as the sun rises. By 10:00, it reaches 6, signaling a rise in sun intensity, culminating in a striking 10 from 12:00 to 13:00, indicating a high risk of harm from unprotected sun exposure. As the day progresses, the UV Index declines, dropping to 3 by 17:00, and steadily returning to 1 by 19:00. This data highlights the importance of sun protection, especially during midday when the UV Index is at its highest.

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	8	very high	15 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 Sumner

The UV Index varies seasonally, with notable increases in the spring and summer months. High-risk months for UV exposure are March through August, where the index peaks at 11 in June, categorized as extreme. During this period, burn times sharply decrease, with a mere 10 minutes of sun exposure potentially leading to skin damage. In contrast, the winter months of January and December see a return to a moderate index of 3, allowing for 30 minutes without severe risk of burns. Visitors and residents should take precautions from March to August by seeking shade, wearing protective clothing, and applying sunscreen, especially during peak hours, to minimize the risk of UV-related health issues.

Monthly Maximum UV Index for Sumner, United States

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

The table above highlights how UV exposure in Sumner 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.

Sumner'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
Sumner	3	5	7	9	10	11	10	9	9	6	4	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