UV Index in Catalina, United States

Last updated: July 2, 2025

In Catalina, United States, staying informed about the UV Index is crucial for protecting your skin. Understanding UV levels helps prevent sunburn and promotes overall skin health, especially in a region where sunlight can be intense. With a BSk climate, Catalina experiences elevated UV exposure, peaking at 12 around noon, which signifies very high risk for harm from unprotected sun exposure. This knowledge empowers residents and visitors to enjoy Catalina’s beautiful outdoor activities while taking necessary precautions to shield themselves from the sun's harmful rays.

Hourly UV Index in Catalina

As the sun rises, the UV Index starts off mild at 1 at 07:00, making it safe to enjoy the morning outdoors. By 08:00, it increases to 3, signaling the need for light protection. However, the real intensity kicks in as the clock strikes 10:00, with the index peaking at a robust 12 by 12:00 and 13:00. During these hours, the sun’s rays are at their strongest, reaching a maximum of 11 at 11:00. As afternoon transitions into evening, the index begins to decline, dropping to 10 at 14:00 and gradually falling to 1 by 19:00. To make the most of your day, plan your outdoor activities in the early morning or late afternoon for a safer experience under the sun!

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	12	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 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 Catalina

Throughout the year, the UV Index varies significantly, posing different levels of risk to visitors and residents. From January to April, UV exposure starts low but escalates sharply, peaking in May and June at an extreme UV Index of 12, resulting in a burn time of just 10 minutes. The high-risk months are notably March through August, where caution is essential due to very high to extreme UV levels. September maintains high UV exposure, before tapering down in October. As we approach the winter months, the UV Index reduces, with levels returning to moderate by December. To ensure safety, it's crucial for everyone to apply sunscreen regularly, seek shade during peak hours, and wear protective clothing, especially during the highest risk periods.

Monthly Maximum UV Index for Catalina, United States

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

The table above highlights how UV exposure in Catalina 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.

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