UV Index in Galveston, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents and visitors in Galveston, Texas, where sunshine and warm weather prevail. Being aware of UV levels can significantly help in preventing sunburn and protecting skin health, allowing individuals to enjoy Galveston's beautiful beaches without the risk of harmful consequences. With a Dfa climate characterized by humid summers, the UV exposure risks can peak throughout the day, especially around midday when the index reaches as high as 10. By staying informed about the UV Index, you can take proactive steps to safeguard your skin and embrace the sunny joys of Galveston!

Hourly UV Index in Galveston

The UV Index reveals a dynamic pattern throughout the day, beginning with a minimal UVI of 1 at 07:00, and gradually rising as the sun ascends. By 10:00, it reaches 4, signaling a shift towards higher exposure, and by 12:00, it peaks at an impressive 8. Among the highest readings, 13:00 and 14:00 hit a scorching 10, emphasizing the need for sun protection during these hours. As the afternoon wanes, the index starts to decline, dropping to 7 by 16:00, and further declining to 5 at 17:00. As evening approaches, the UVI diminishes to 3 at 18:00, and concludes with a gentle 2 at 19:00. This pattern underscores the importance of vigilance against UV exposure as midday approaches, encouraging outdoor enthusiasts to take precautions when the sun is at its strongest.

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:001low45 min
09:002low45 min
10:004moderate30 min
11:006high25 min
12:007high25 min
13:009very high15 min
14:009very high15 min
15:008very high15 min
16:007high25 min
17:004moderate30 min
18:002low45 min
19:001low45 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.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
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.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Galveston356910111098642
Los Angeles UVI46891011111010754
Houston UVI589111112121110975