UV Index in Henderson, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Henderson, United States, where the arid BWk climate leads to high UV exposure, especially during the peak hours of sunlight. Awareness of UV levels is essential for preventing sunburn and protecting skin health, as they can fluctuate dramatically throughout the day—rising to a maximum of 12 around noon. With consistent sunshine, knowing when to seek shade or apply sunscreen is vital for enjoying the beautiful weather while safeguarding your skin from potential damage. Stay informed and stay safe in Henderson's radiant sun!

Hourly UV Index in Henderson

As the sun rises, the UV Index begins to climb steadily, starting at a mild 1 at 07:00. By 08:00, it reaches 3, indicating a cautious approach to sun exposure. The peak of the day arrives between 11:00 and 13:00, where the UV Index skyrockets to 10 and 12, signaling a high risk of harm from unprotected sun exposure. Even as the clock ticks toward 14:00, it remains critical at 11. As the afternoon wanes, the index drops to 9 at 15:00, and continues to decline, ultimately settling back to a safe 1 by 18:00. It's essential to stay protected during the midday hours when UV radiation is at its strongest!

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	11	extreme	10 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Henderson

Throughout the year, the UV Index exhibits significant seasonal variations, peaking during the summer months of May to August, where it reaches extremes of 11 to 12. The highest risk occurs in May, June, and July, with burn times as short as 10 minutes under these conditions. March and April also present considerable UV exposure, categorized as very high, with burn times of just 15 minutes. Visitors and residents should exercise caution from late winter through summer, especially during these high-risk months, by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen regularly to minimize the risk of skin damage. As the season transitions into fall and winter, UV levels decrease, offering more moderate exposure from October to December.

Monthly Maximum UV Index for Henderson, United States

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

The table above highlights how UV exposure in Henderson 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.

Henderson'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
Henderson	4	6	8	10	11	12	12	11	10	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5