August Weather in Galveston, United States

Last updated: June 24, 2025

In August, the average temperature in Galveston, United States hovers around 23°C (74°F). While you may experience lows of 11°C (52°F), sunny days can soar up to a comfortable 34°C (94°F). Expect approximately 101 mm (4.0 in) of rainfall spread over about 10 days, contributing to an average humidity level of 79%. Embrace the climate and enjoy your time!

August Temperature in Galveston

In August in Galveston, the average temperature is 23°C (74°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 11°C (52°F). This climate makes Galveston an ideal destination for travelers seeking warm weather with pleasant evenings.

August Weather in Galveston: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Galveston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Galveston, August typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for Galveston generated using information from the Copernicus Climate Change Service.

August Precipitation in Galveston

In Galveston in August, the precipitation amount is 101 mm (4.0 in) spread over the course of 10 days.

August Precipitation Trends in Galveston

The chart displays monthly precipitation patterns in Galveston, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Galveston, August typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Galveston

In Galveston in August, humidity is 79%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit less comfortable, urging travelers to seek shade and hydration throughout the day.

August Average Humidity in Galveston

This chart illustrates the average monthly humidity levels in Galveston, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Galveston is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Galveston

In Galveston in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Galveston.

Maximum UV Index Levels in Galveston for August

The chart shows the monthly maximum UV Index (UVI) for Galveston in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Galveston typically reaches 9, which falls under the very high exposure category.

Data source: Galveston August UVI data generated using 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.

How August Weather in Galveston Compares to Other Months

Weather in Galveston varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Galveston, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Galveston, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	76 mm (3.0 inches)	85%	moderate
February Weather	0°C (32°F)	82 mm (3.2 inches)	85%	moderate
March Weather	5°C (42°F)	104 mm (4.1 inches)	86%	high
April Weather	11°C (51°F)	93 mm (3.7 inches)	87%	very high
May Weather	18°C (64°F)	152 mm (6.0 inches)	81%	very high
June Weather	23°C (73°F)	105 mm (4.2 inches)	82%	extreme
July Weather	24°C (76°F)	97 mm (3.8 inches)	81%	very high
August Weather	23°C (74°F)	101 mm (4.0 inches)	79%	very high
September Weather	21°C (69°F)	67 mm (2.6 inches)	78%	very high
October Weather	14°C (57°F)	105 mm (4.1 inches)	81%	high
November Weather	5°C (41°F)	79 mm (3.1 inches)	89%	moderate
December Weather	2°C (35°F)	66 mm (2.6 inches)	86%	low