August Weather in Houston, United States

Last updated: June 24, 2025

In August, the average temperature in Houston, United States hovers around 13°C (56°F). Expect a minimum of 2°C (37°F) and a maximum of 24°C (76°F). Be prepared for 152 mm (6.0 in) of rainfall spread over 18 days. With an average humidity of 100%, the atmosphere can feel quite damp and invigorating.

August Temperature in Houston

In August in Houston, the average temperature is 13°C (56°F). Maximums can reach 24°C (76°F) and minimums can be as low as 2°C (37°F). Be sure to pack layers for your travels, as the weather can vary quite significantly throughout the day.

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

The chart illustrates August temperature patterns in Houston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Houston, August typically has an average temperature of 13°C (56°F), with highs reaching up to 24°C (76°F) and lows dropping to around 2°C (37°F).

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

August Precipitation in Houston

In Houston in August, the precipitation amount is 152 mm (6.0 in) distributed over 18 days.

August Precipitation Trends in Houston

The chart displays monthly precipitation patterns in Houston, 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 Houston, August typically receives around 152 mm (6.0 inches) of precipitation spread over approximately 18 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 Houston

In Houston in August, humidity is 100%. With an average temperature of 13°C (56°F), this humidity feels like a heavy blanket enveloping you, making travel uncomfortable as the air hangs thick and damp, leaving you longing for a cool breeze to refresh your senses.

August Average Humidity in Houston

This chart illustrates the average monthly humidity levels in Houston, 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 Houston is approximately 100%, 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 Houston

In Houston in August, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Houston.

Maximum UV Index Levels in Houston for August

The chart shows the monthly maximum UV Index (UVI) for Houston 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 Houston typically reaches 5, which falls under the moderate exposure category.

Data source: Houston 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 Houston Compares to Other Months

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

This table compares monthly weather conditions in Houston, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	38 mm (1.5 inches)	94%	low
February Weather	-9°C (16°F)	49 mm (1.9 inches)	93%	low
March Weather	-6°C (21°F)	42 mm (1.7 inches)	91%	moderate
April Weather	2°C (36°F)	43 mm (1.7 inches)	85%	moderate
May Weather	9°C (48°F)	99 mm (3.9 inches)	88%	high
June Weather	13°C (55°F)	98 mm (3.9 inches)	95%	high
July Weather	15°C (60°F)	103 mm (4.0 inches)	102%	high
August Weather	13°C (56°F)	152 mm (6.0 inches)	100%	moderate
September Weather	9°C (48°F)	106 mm (4.2 inches)	96%	moderate
October Weather	2°C (37°F)	109 mm (4.3 inches)	91%	low
November Weather	-7°C (20°F)	63 mm (2.5 inches)	95%	low
December Weather	-8°C (18°F)	76 mm (3.0 inches)	96%	low