UV Index in Kahalu'u, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Kahalu'u, United States, where the tropical climate offers abundant sun but also elevated risks for skin damage. With UV levels peaking in the afternoon, reaching a maximum of 13 around noon, awareness can mean the difference between a fun day outside and a painful sunburn. Protecting your skin from harmful rays not only prevents immediate discomfort but also contributes to long-term skin health. As you explore the beautiful outdoors in Kahalu'u, staying informed about UV exposure is key to enjoying the sun safely.

Hourly UV Index in Kahalu'u

The UV Index during the day reveals a notable peak in sun exposure. Starting at 07:00 with a gentle 1, it gradually climbs to 2 by 08:00. As the sun rises higher, the index surges dramatically, hitting 5 at 09:00, and reaching a striking 8 by 10:00. The intensity peaks at 12:00 with a scorching 13, remaining high until 13:00. After that, it starts to decline, returning to 11 at 14:00 and falling to 8 by 15:00. As the afternoon wanes, the index drops to 5 at 16:00, and finally settles back to 1 by 18:00 and 19:00. This data highlights the importance of sun safety measures during the midday hours when UV exposure is at its 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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 min
16:00	5	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Kahalu'u

During the year, the UV Index exhibits significant seasonal fluctuations, peaking in the summer months. February through October marks a period of high to extreme UV levels, with particularly high risk from March to September, when the Index reaches as high as 13. Visitors and residents should be especially cautious during these months, as the burn time drops to just 10 minutes under extreme conditions. In contrast, January and December offer relatively safer exposure levels, with a UV Index of 7. To minimize the risk of UV-related damage, it is crucial for individuals to wear protective clothing, apply sunscreen, and limit sun exposure during the high-risk months, particularly between midday and early afternoon when the sun's rays are strongest.

Monthly Maximum UV Index for Kahalu'u, United States

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

The table above highlights how UV exposure in Kahalu'u 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.

Kahalu'u'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
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5
Kahalu'u	7	10	11	12	12	13	13	13	12	11	8	7