UV Index in San Antonito, United States

Last updated: July 2, 2025

In San Antonito, United States, understanding the UV Index is crucial for safeguarding your skin health and preventing sunburn. With peak UV levels soaring to a dangerous 12 during midday hours, awareness of these fluctuations can significantly reduce your risk of skin damage. Given the area's Cfb climate, characterized by mild temperatures and varying exposure to sunlight, it's essential to monitor UV levels daily. By staying informed about the UV Index in San Antonito, you can enjoy the outdoors safely and protect yourself from the harmful effects of UV radiation.

Hourly UV Index in San Antonito

As the sun climbs higher in the sky, the UV Index undergoes a dramatic shift throughout the day. Starting at a modest 1 by 07:00, it quickly gains momentum, reaching 2 by 08:00. By 09:00, it hits 4, but the real surge begins as we approach midday; at 10:00, it spikes to 7, culminating in a peak of 12 from 12:00 to 14:00. This high level of UV radiation calls for caution, especially for outdoor activities. As the afternoon progresses, the index gradually decreases, dipping to 10 at 15:00, before winding down to 4 by 17:00, and finally retreating to 1 by 19:00 as the day comes to a close. Remember to protect your skin 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	12	extreme	10 min
13:00	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	7	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 San Antonito

The UV Index exhibits significant seasonal variation, with peak levels occurring from March to September. During this period, particularly in April to August, the UV Index reaches extreme levels, making these the highest risk months for sun exposure. For instance, April and May have UV Index values of 11 and 12, respectively, allowing only 10 minutes of unprotected sun exposure before burns may occur. Conversely, months like January and December show a moderate UV Index of 4, where the burn time extends to 30 minutes. Visitors and residents are advised to take proactive sun safety measures, such as wearing sunscreen, protective clothing, and seeking shade, especially during the high-risk months.

Monthly Maximum UV Index for San Antonito, United States

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

The table above highlights how UV exposure in San Antonito 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.

San Antonito'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
San Antonito	4	7	9	11	12	13	12	12	11	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5