UV Index in Tracy, United States

Last updated: July 2, 2025

In Tracy, California, awareness of the UV Index is crucial for protecting skin health and preventing painful sunburns. Understanding the daily UV levels allows residents to enjoy the sun safely, especially during peak hours when the index reaches an intense 11 around noon. With Tracy's Mediterranean climate, characterized by warm, dry summers, the risk of overexposure increases significantly. Stay informed and safeguard your skin by checking the UV Index regularly, ensuring you enjoy the sunny Californian days while minimizing health risks.

Hourly UV Index in Tracy

As the day unfolds, the UV Index rises steadily, peaking at 11 around 1 PM—a clear signal for sun protection. Starting from a low of just 1 at 7 AM, it escalates through the morning, hitting 8 by 11 AM. At 12 PM, the intensity reaches a significant 10, before slightly diminishing to 9 at 3 PM and tapering off rapidly in the afternoon. As the sun begins to set, the UV levels drop to 4 by 5 PM, finally settling back to 1 by 7 PM. With this clear UV trajectory, staying cautious during the peak hours, especially from 11 AM to 2 PM, is essential for skin safety. Don your sunscreen and enjoy the sun responsibly!

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

Monthly UV Index Trends in Tracy

Throughout the year, the UV Index exhibits significant seasonal changes that highlight periods of high risk for sun exposure. The UV Index starts at a moderate level of 3 in January and February, but sharply rises to extremes of 11 during the summer months of May through July. March and April also see dangerous levels, with indexes reaching 8 and 9 respectively. The risk tapers off again in the fall, with October at a high level of 7, followed by moderate levels in November and December. Visitors and residents should exercise caution, particularly during the high-risk months of March through August, when burn times can be as low as 10 to 15 minutes. It is advised to seek shade, wear protective clothing, and apply sunscreen regularly during these times to minimize the risk of harmful UV exposure.

Monthly Maximum UV Index for Tracy, United States

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

The table above highlights how UV exposure in Tracy 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.

Tracy'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
Tracy	3	5	8	9	11	11	11	10	9	7	5	3
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