UV Index in Galveston, United States

Last updated: June 2, 2025

In Galveston, United States, being aware of the UV Index is crucial for protecting your skin from harmful radiation. Understanding UV levels helps residents and visitors alike prevent sunburn and maintain long-term skin health. Known for its warm Dfa climate, Galveston typically experiences high UV exposure, especially during peak hours when the index can soar to 11. With such risks, staying informed about daily UV levels can make all the difference in enjoying the sun safely.

Hourly UV Index in Galveston

The UV Index today demonstrates a dramatic rise in intensity as the sun reaches its zenith. Starting off the day at a modest 1 at 07:00 and 08:00, the index begins to climb steadily, hitting 3 by 09:00. A significant leap occurs around 10:00, where it peaks at 4, but the real intensity emerges from 11:00 onwards, with the index skyrocketing to a scorching 11 at 14:00, marking the peak UV exposure of the day. After this height, the index begins to decline, settling at 5 by 17:00, and tapering off to 2 by 19:00. Make sure to protect your skin during those peak hours, especially between 11:00 and 15:00, to ensure 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	1	low	45 min
09:00	3	moderate	30 min
10:00	4	moderate	30 min
11:00	7	high	25 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	7	high	25 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	2	low	45 min

Monthly UV Index Trends in Galveston

As the seasons change, so do the UV Index levels, significantly impacting sun exposure risk. High-risk months occur from April through September, with the peak UV Index reaching 11 in June, categorized as extreme, and a burn time of just 10 minutes. In contrast, January and December present the lowest risk, with UV Index levels of 3 and 2, respectively. Visitors and residents should be particularly cautious during the very high to extreme UV periods; wearing sunscreen, seeking shade, and wearing protective clothing are essential measures to minimize the risk of sunburn and long-term skin damage. Regularly checking the daily UV Index will help ensure safe outdoor activities throughout the year.

Monthly Maximum UV Index for Galveston, United States

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

The table above highlights how UV exposure in Galveston 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.

Galveston'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
Galveston	3	5	6	9	10	11	10	9	8	6	4	2
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