UV Index in Alhambra, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Alhambra, United States, where the sunny BSk climate can lead to significant UV exposure, especially during the warmer months. Awareness of UV levels helps in preventing sunburn and protecting your skin health, ensuring you enjoy the outdoors safely. With peak UV Index readings reaching 11 around noon, it’s important to take precautions to shield yourself from harmful rays, particularly as the risk increases significantly between 10 AM and 2 PM. Stay informed and proactive to make the most of your time under the California sun!

Hourly UV Index in Alhambra

Expect a sunny day with a fluctuating UV Index that peaks at 11 around midday. The morning starts off gentle, with values rising from 1 at 7:00 AM to 4 by 9:00 AM. As the sun climbs higher, the UV Index escalates sharply, reaching 9 by 11:00 AM and hitting its highest point of 11 at both 12:00 PM and 1:00 PM. After the sun’s zenith, the UV levels gradually decline, dropping to 10 at 2:00 PM and tapering off to 1 by 7:00 PM. Remember to protect your skin during those peak hours for a safe and enjoyable day outdoors!

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	4	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Alhambra

Throughout the year, seasonal variations in UV exposure significantly influence skin safety for residents and visitors. From January to December, the UV Index rises sharply from a moderate level of 4 in January to an extreme level of 11 in June and July, representing the high-risk months for sunburn and skin damage. Specifically, March through August present the most hazardous conditions, with very high to extreme ratings leading to burn times as short as 10 to 15 minutes. During these months, it is crucial for individuals to take precautions, including wearing protective clothing, using sunscreen, and seeking shade during peak sun hours. Conversely, the UV levels drop in late fall and winter, allowing for safer outdoor activities with lower burn times of 25 to 30 minutes in October, November, and December. Staying informed and proactive about UV exposure can help ensure a healthier outdoor experience year-round.

Monthly Maximum UV Index for Alhambra, United States

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

The table above highlights how UV exposure in Alhambra 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.

Alhambra'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
Alhambra	4	6	8	9	10	11	11	10	10	7	5	4
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