UV Index in Orange, United States

Last updated: June 2, 2025

Understanding the UV Index is vital for residents of Orange, United States, where sunshine is abundant throughout the year. High UV levels can lead to sunburns and long-term skin damage, making it crucial to monitor daily UV exposure. With Orange’s Cfa climate, characterized by warm summers and moderate winters, residents face significant UV exposure risks, especially during peak hours from 11 AM to 3 PM when the index can reach as high as 10. Stay informed and protect your skin by checking the UV Index regularly!

Hourly UV Index in Orange

The UV Index reveals a dynamic ascent and descent throughout the day, peaking with intensity during midday. Starting at a gentle 1 at 7:00 AM, it climbs steadily, reaching 10 by 1:00 PM and maintaining this highest level until 2:00 PM. This critical window indicates significant sun exposure, and it’s essential to take precautions. As the afternoon progresses, the index begins to taper off, dropping to 8 at 3:00 PM, then gradually falling to 1 by 7:00 PM. This data highlights the importance of being sun-smart during the peak hours to minimize UV exposure risks.

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	10	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 Orange

Throughout the year, UV Index levels fluctuate significantly, influencing the potential for sunburn and skin damage. High-risk months typically occur from April to September, where the UV Index reaches high to extreme levels. Notably, May stands out as the peak month with an extreme UV Index of 11, resulting in a burn time as short as 10 minutes. Visitors and residents alike should take precautions during these months by seeking shade, wearing protective clothing, and applying high-SPF sunscreen. In contrast, January, February, November, and December exhibit lower UV Index levels with moderate exposure categories, allowing for longer safe sun exposure times of 30 minutes. Regardless of the month, being mindful of the UV Index is essential for maintaining skin health throughout the year.

Monthly Maximum UV Index for Orange, United States

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

The table above highlights how UV exposure in Orange 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.

Orange'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
Orange	3	5	7	9	11	10	10	9	8	7	5	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