UV Index in Alpine, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Alpine, United States, where the Csa climate can lead to increased sun exposure risks, especially during peak hours. With a maximum UV Index reaching 11 during midday, awareness of UV levels plays a key role in preventing sunburn and protecting your skin health. By tracking these fluctuations—from a mild 1 in the early morning to a severe 10 and 11 around noon—Alpine residents can take proactive steps to safeguard against harmful UV rays, ensuring a safe and enjoyable time outdoors.

Hourly UV Index in Alpine

At dawn, the UV Index starts at a gentle 1 and gradually rises as the sun climbs higher in the sky. By 09:00, it reaches a moderate 4, signaling a good time to enjoy some outdoor activities while still being cautious. However, between 11:00 and 13:00, the UV Index peaks dramatically at 10 and 11, marking the hours of highest intensity when sun safety measures are crucial. As the afternoon progresses, it slowly declines to 8 at 15:00, offering a bit of relief before dropping further to 3 by 17:00. As daylight wanes, the UV Index returns to a low 1 by 19:00, making it safe to enjoy the evening outdoors without concern for UV exposure.

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	11	extreme	10 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Alpine

Throughout the year, the UV Index exhibits significant seasonal variations, with high-risk months typically occurring from March to September. During this period, the UV Index reaches extremes, peaking at 12 in June and July, indicating a very high to extreme exposure risk where the burn time can be as little as 10 minutes. As spring transitions into summer, it is crucial for both visitors and residents to take protective measures, such as wearing sunscreen, protective clothing, and seeking shade, especially during midday hours. Conversely, the UV Index drops in winter months, with January and December showing moderate levels of 4. Nonetheless, even in these months, it’s advisable to remain vigilant, as UV radiation can still cause skin damage.

Monthly Maximum UV Index for Alpine, United States

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

The table above highlights how UV exposure in Alpine 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.

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