UV Index in Azusa, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Azusa, United States, as it serves as a vital tool for safeguarding skin health against harmful ultraviolet rays. High UV levels can lead to painful sunburns and long-term skin damage, making awareness particularly important during peak sun hours. With Azusa’s Csb climate, characterized by mild summers and clear skies, the UV Index can soar to an alarming 12 at midday, emphasizing the need for proactive sun protection strategies. Stay informed and take the necessary precautions to enjoy the sunshine safely!

Hourly UV Index in Azusa

The UV Index today presents a dynamic shift, starting from a low 1 at 07:00 and peaking at a striking 12 around 13:00. Between 10:00 and 14:00, the sun is at its most intense, with readings soaring to 11 and 12—a clear reminder to seek shade and apply sunscreen. As the afternoon progresses, the intensity begins to wane, dropping to 9 by 15:00 and further declining to 3 at 17:00. The evening brings a gentle relief, with the UV Index falling to 1 by 19:00. Stay vigilant and protect yourself during those peak 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	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	11	extreme	10 min
15:00	9	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 Azusa

Throughout the year, the UV Index experiences significant fluctuations, with the highest levels occurring from March to August. March and April both exhibit a very high UV Index of 9 and 10, respectively, leading to a burn time of only 15 minutes. The peak months, May and June, are classified as extreme with a UV Index of 11 and 12, necessitating caution as the burn time reduces to just 10 minutes. July and August continue this trend, remaining in the extreme category, before a gradual decline in September to 10 (very high) and further down to high with an Index of 7 in October. The year wraps up with moderate levels in November and December, where the burn time increases to 30 minutes. Given these variations, residents and visitors should take extra precautions from March through October, particularly during May and June, by wearing protective clothing, applying high-SPF sunscreen, and seeking shade to minimize their risk of sunburn and long-term skin damage.

Monthly Maximum UV Index for Azusa, United States

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

The table above highlights how UV exposure in Azusa 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.

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