UV Index in Hillsboro, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Hillsboro, United States, where the Cfa climate means warm summers and increased sun exposure. With UV levels peaking at 11 during midday hours, being aware of these ratings can help you prevent sunburn, protect your skin health, and make informed decisions about outdoor activities. As you enjoy the beautiful outdoors, knowing the UV Index empowers you to take proactive measures against skin damage and enjoy your time under the sun safely.

Hourly UV Index in Hillsboro

As the day unfolds, the UV Index rises steadily, peaking at an intense 11 around 12:00 PM to 2:00 PM. This is the moment when sun safety is crucial, urging everyone to seek shade and apply sunscreen. The morning starts moderately, with a low of 1 at 7:00 AM, ascending to 4 by 9:00 AM. At 10:00 AM, the index reaches 6, then spikes to 9 at 11:00 AM as the sun climbs higher. After the midday peak, the UV levels gradually decline, dropping to 3 by 5:00 PM, and settling at 1 again by 7:00 PM. Remember, during the highest UV Index hours, staying protected is essential!

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	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Hillsboro

Throughout the year, the UV Index experiences significant fluctuations, with the highest values occurring from April to August, where levels reach 11 to 12 and are categorized as extreme. This indicates a burn time of only 10 minutes during these peak months. Visitors and residents should be particularly cautious during these high-risk months, as exposure can lead to serious skin damage. March and September also present elevated risks with indices of 8 and 10, respectively, categorized as very high. It's advisable for everyone to take protective measures, such as wearing sunscreen, hats, and protective clothing, especially during midday hours when UV radiation is most intense. In comparison, the months of January, December, and November see lower UV indices (ranging from 4 to 6), where the burn time increases to 25-30 minutes, though sun protection is still recommended.

Monthly Maximum UV Index for Hillsboro, United States

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

The table above highlights how UV exposure in Hillsboro 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.

Hillsboro'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
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Hillsboro	4	7	8	11	11	12	11	11	10	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5