Austin Weather in August

August brings the year's hottest weather to Austin, Texas. Most days have temperatures in the 90s Fahrenheit (over 32 °C) and the nights seldom cool down below 70 °F (21 °C).

This page gives detailed information on the typical August temperature, precipitation, sun, humidity, wind and storms for Austin. The numbers here are historical averages based on climate data gathered at Camp Mabry, located at few miles from downtown Austin.

Temperature Weather iconTemperature

98 °F August average high 37 °C
75 °F August average low 24 °C

August is Austin's hottest month overall, with temperatures peaking from the 1st to the 13th. These dates have daily highs averaging 99 degrees Fahrenheit (37 degrees Celsius) and lows of 76 °F (24 °C).

29 days 90 °F max. or more (32 °C)
2 days 70 °F min. or less (21 °C)

During August the temperature usually rises every day to over 80 °F (27 °C) at Austin. The city averages 13 days this month when the thermometer reaches into the 100s °F (over 38 °C).

August does not normally cool down below 60 °F (16 °C) at night.

Rainy Weather iconRain

2.7 in total precipitation 70 mm
5 days of rain

Half the time, Austin receives 0.4 to 2.8 inches (11 to 72 mm) of rainfall in August. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

74 % sunshine
12 days clear skies

August is one of the sunniest months for Austin. The sun's rays reach the ground during 74 percent of daylight hours on average, for a total of 303 hours in the month. Typically on 12 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at Austin lasts for 13 hours and 11 minutes a day on average. The longest day of the month is the 1st with 13 hours and 35 minutes of daylight. By the end of the month, the days have shortened to 12:47 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

64 % August average humidity

The relative humidity in Austin during August usually peaks at 87 percent in the morning then drops to 42 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 73 82 87 70 50 42 46 61

Windy Weather iconWind

7.4 mph August wind speed average 11.9 kph

August is less windy than most other months in Austin.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
5 days with thunderstorms in August
10 % chance a named storm approaches

There's a 2 percent probability that a hurricane will approach within 100 miles (165 km) of Austin during August. The likelihood of a major hurricane (category 3 to 5) reaching the area is 1 percent.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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