UV Index in Heppner, United States

Last updated: June 2, 2025

In Heppner, United States, maintaining an awareness of the UV Index is vital for safeguarding your skin and overall health. Understanding UV levels empowers residents to take proactive steps against sunburn and long-term skin damage, especially given the area's Csb climate which combines mild summers with occasional peaks in ultraviolet radiation. During peak hours, especially around noon when the UV Index can soar to 10, residents should be particularly cautious to mitigate exposure risks. Staying informed about daily UV levels not only helps you enjoy the outdoors safely but also significantly reduces the likelihood of skin-related health issues.

Hourly UV Index in Heppner

The UV Index throughout the day shows a clear progression in intensity, peaking at a formidable 10 around noon. The morning starts off relatively mild, with values of 1 at 7:00 AM gradually rising to 4 by 9:00 AM. As the day unfolds, the index escalates swiftly, reaching 8 by 11:00 AM and then hitting its zenith of 10 at 12:00 PM and 1:00 PM. After this peak, there’s a noticeable decline; by 3:00 PM, it drops to 8 and continues to decrease until it settles back at 1 by 7:00 PM. This data underscores the importance of sun protection during the peak hours of 11:00 AM to 1:00 PM, when UV exposure is 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	6	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 Heppner

Throughout the year, the UV Index experiences significant fluctuations, with the highest risk of harmful exposure occurring from March to September. During this peak season, particularly in April through August, the UV Index reaches levels of 8 to 10, categorizing exposure as very high and reducing the burn time to just 15 minutes. Conversely, the winter months see much lower UV levels; for instance, January and February maintain a moderate index of 3 and 4, while December drops to a low level of 2. Visitors and residents are advised to take extra precautions during high-risk months, especially by wearing sunscreen, protective clothing, and seeking shade when outdoors to minimize the risk of skin damage.

Monthly Maximum UV Index for Heppner, United States

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

The table above highlights how UV exposure in Heppner 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.

Heppner'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
Heppner	3	4	6	8	9	10	10	9	8	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