UV Index in Kailua, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Kailua, United States, where sunny skies and tropical weather create the perfect backdrop for outdoor activities. Keeping an eye on UV levels not only helps in preventing painful sunburns but also plays a significant role in maintaining long-term skin health. With maximum UV Index readings peaking at 13 around midday—indicating a high risk of harm from unprotected sun exposure—it's essential to be vigilant. Given Kailua's warm climate and typical UV exposure risks, being informed can make a significant difference in enjoying the sun safely.

Hourly UV Index in Kailua

As the sun rises, the UV Index begins to climb steadily. Starting at a mild 1 at 7:00 AM, the intensity increases to a moderate 3 by 8:00 AM. However, it's not until 10:00 AM that the UV Index hits 8, signaling the need for sun protection. The peak occurs at 12:00 PM with a soaring 13, making it crucial to take precautions if you're outdoors. As the afternoon progresses, the index gradually declines, dropping to 10 at 2:00 PM and sliding to 7 by 3:00 PM. By evening, the UV levels decrease significantly, settling back to 1 by 7:00 PM. Stay safe and safeguard your skin during peak sun hours!

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	8	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	1	low	45 min

Monthly UV Index Trends in Kailua

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 Kailua, United States

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

The table above highlights how UV exposure in Kailua 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.

Kailua'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
Kailua	7	10	11	12	12	13	13	13	12	11	8	7