UV Index in Sumner, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Sumner, United States, where the combination of a Cfa climate and varying sun exposure can significantly impact skin health and sunburn risk. With UV levels peaking at 11 around midday, awareness of these fluctuating readings can help you protect yourself from harmful rays. Shielding your skin from intense UV radiation not only prevents painful sunburns but also plays a vital role in long-term skin health. Prepare yourself for outdoor activities by staying informed about the UV Index in Sumner, ensuring that you enjoy the sun safely!

Hourly UV Index in Sumner

The UV Index throughout the day reveals a dramatic rise in solar intensity. Starting at a mild 1 at 07:00, it climbs steadily, reaching 2 by 08:00. The real spike occurs as the sun climbs higher, with the index jumping to 4 at 09:00, before peaking at a striking 11 by 13:00—the highest risk of the day. After this peak, the UV levels gradually taper off, dropping to 8 at 15:00, and settling to a gentle 2 by 18:00. Remember to don that sunscreen during the midday hours to protect your skin from the sun’s powerful rays!

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	7	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	10	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