UV Index in Kapa'a, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Kapa'a, Hawaii, where the sun's rays can be particularly intense. By keeping an eye on UV levels, individuals can better protect themselves against painful sunburns and long-term skin damage. Kapa'a’s tropical climate means higher UV exposure, especially during peak hours when the index can rise to a maximum of 12. This highlights the importance of sun safety measures to ensure a healthy experience in the beautiful outdoors. Stay informed and enjoy all that Kapa'a has to offer while safeguarding your skin!

Hourly UV Index in Kapa'a

As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00 and gently climbing to 2 by 08:00. The warmth of midday brings a significant surge, with the index peaking at a striking 12 between 12:00 and 13:00—a reminder to stay protected with sunscreen and hats! As the afternoon progresses, the levels gradually decline, dropping to 8 by 15:00 and further easing back to 1 by the time the sun sets at 19:00. This hourly fluctuation highlights the importance of being mindful of UV exposure, especially during those peak hours when the sun’s rays are 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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	12	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 Kapa'a

Throughout the year, UV levels exhibit significant seasonal changes, peaking during the warmer months. From January to December, the UV Index rises dramatically, reaching an extreme level of 13 from May to August, making these high-risk months for sun exposure. During this period, the recommended burn time drops to just 10 minutes, indicating the urgent need for protection such as sunscreen and clothing. February and March also present heightened danger, categorized as very high and extreme, respectively, where the burn time sharply decreases. As the year progresses towards October and November, the UV Index begins to decline, but still remains very high at 10 and 8, allowing for burn times of only 15 minutes. Visitors and residents are advised to exercise caution and take preventative measures, particularly from February through September, to mitigate the risks associated with high UV exposure.

Monthly Maximum UV Index for Kapa'a, United States

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

The table above highlights how UV exposure in Kapa'a 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.

Kapa'a'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
Kapa'a	7	10	11	11	13	12	13	13	12	10	8	7