UV Index in Kahului, United States

Last updated: June 2, 2025

In Kahului, United States, staying aware of the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels can help you prevent sunburn and long-term skin damage, making it essential for both residents and visitors alike. With a predominantly sunny climate, Kahului experiences significant UV exposure, particularly between 10 AM and 2 PM, when indices can soar to 13—a level prompting immediate protective measures. Being informed about these risks empowers you to enjoy the beautiful Hawaiian sun while keeping your skin protected and healthy.

Hourly UV Index in Kahului

The UV Index begins at a mild level of 1 at 07:00, but as the sun climbs higher, it swiftly escalates. By 10:00, it peaks at a critical 9, reaching a maximum of 13 at 12:00, indicating that protective measures are essential. After noon, the index gradually declines, tapering to 7 by 15:00, before dipping to a 2 by 17:00, and finally settling at 0 by 19:00 as the sun sets. This data highlights the importance of sun safety during the hours when UV exposure is at its highest, particularly around midday.

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	3	moderate	30 min
09:00	5	moderate	30 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Kahului

Throughout the year, UV exposure varies significantly, with the highest levels occurring from March to September, where the UV Index peaks at 13 during the summer months. Specifically, February through October are identified as high-risk months, showcasing very high to extreme UV levels that necessitate caution. With a minimal burn time of 10 minutes during the peak months of April through September, it is crucial for visitors and residents to take protective measures, such as wearing sunscreen, protective clothing, and sunglasses, especially when outside during midday hours. As the season transitions, November and December still present very high UV levels (Index 8), emphasizing the need for continued vigilance despite cooler temperatures. Always regard the UV Index and prioritize skin protection to prevent sun damage year-round.

Monthly Maximum UV Index for Kahului, United States

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

The table above highlights how UV exposure in Kahului 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.

Kahului'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
Kahului	7	10	11	12	12	13	13	13	12	11	8	8