Dallas Weather in August

August's weather is the hottest of the year for Dallas, Texas. Usually many days this month top 100 degrees Fahrenheit (38 °C).

This page gives detailed information on the typical August temperature, precipitation, sun, humidity, wind and storms for Dallas. The temperature, precipitation and wind speed numbers here are historical averages based on climate data gathered at the Dallas Love Field Airport, located a few miles from downtown Dallas. The rest of the measurements are averages from the nearby Dallas - Fort Worth International Airport.

Temperature Weather iconTemperature

97 °F August average high 36 °C
77 °F August average low 25 °C

August is the hottest month overall for Dallas, with temperatures peaking from the 1st to 5th. These dates have daily highs averaging 99 degrees Fahrenheit (37 degrees Celsius) and lows of 79 °F (26 °C).

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

Usually every day in August, Dallas has a temperature of over 80 °F (27 °C). The city averages 11 days this month when the thermometer reaches into the 100s °F (over 38 °C).

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

Rainy Weather iconRain

2.2 in total precipitation 56 mm
5 days of rain

August is the driest month for Dallas. Half the time, Dallas receives 1.0 to 3.2 inches (24 to 82 mm) of rainfall this month. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

73 % sunshine
15 days clear skies

The sun's rays reach the ground in Dallas during 73 percent of daylight hours on average in August, for a total of 301 hours in the month. Typically on 15 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at Dallas lasts for 13 hours and 18 minutes a day on average. The longest day of the month is the 1st with 13 hours and 44 minutes of daylight. By the end of the month, the days have shortened to 12:51 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

60 % August average humidity

The relative humidity in Dallas during August usually peaks at 80 percent in the morning then drops to 41 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 66 73 80 65 49 41 44 58

Windy Weather iconWind

8.2 mph August wind speed average 13.2 kph

August is less windy than most other months in Dallas.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
5 days with thunderstorms in August
4 % chance a named storm approaches

There's a 4 percent probability that a named tropical storm will approach within 100 miles (165 km) of Dallas during August, and a 2 percent chance of a category 1 or 2 hurricane. Major hurricanes are unlikely here.


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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