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August Weather in Dallas, United States

Last updated: June 24, 2025

In Dallas, United States during August, the average temperature is a comfortable 21°C (69°F). However, temperatures can fluctuate significantly, reaching a minimum of 8°C (47°F) and soaring up to a maximum of 40°C (105°F). With only 5 mm (0.2 in) of precipitation expected over 0 days, residents can enjoy the warm weather, accompanied by an average humidity level of 74%.

August Temperature in Dallas

In August in Dallas, the average temperature is 21°C (69°F), with maximums reaching up to 40°C (105°F) and minimums dipping as low as 8°C (47°F). This variability in temperature means travelers should be prepared for both warm and cool conditions while exploring.

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

The chart illustrates August temperature patterns in Dallas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dallas, August typically has an average temperature of 21°C (69°F), with highs reaching up to 40°C (105°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec414145505763686963534641
Data source: Temperature data for Dallas generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Dallas

In Dallas in August, the precipitation amount is 5 mm (0.2 in) during a span of 0 days.

August Precipitation Trends in Dallas

The chart displays monthly precipitation patterns in Dallas, 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 Dallas, August typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec1651661331135444466089147186
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Dallas

In Dallas in August, humidity is 74%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace that clings to your skin, making every excursion feel slightly more intense and requiring a bit more effort with every step.

August Average Humidity in Dallas

This chart illustrates the average monthly humidity levels in Dallas, 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 Dallas is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Dallas

In Dallas 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 Dallas.

Maximum UV Index Levels in Dallas for August

The chart shows the monthly maximum UV Index (UVI) for Dallas 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 Dallas typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23579101097532
Data source: Dallas 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 Dallas Compares to Other Months

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

This table compares monthly weather conditions in Dallas, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)165 mm (6.5 inches)85%low
February Weather5°C (41°F)166 mm (6.5 inches)84%moderate
March Weather7°C (45°F)133 mm (5.2 inches)85%moderate
April Weather10°C (51°F)112 mm (4.4 inches)83%high
May Weather14°C (57°F)54 mm (2.1 inches)83%very high
June Weather17°C (63°F)44 mm (1.7 inches)83%very high
July Weather20°C (68°F)4 mm (0.2 inches)82%very high
August Weather21°C (69°F)5 mm (0.2 inches)74%very high
September Weather17°C (63°F)60 mm (2.3 inches)71%high
October Weather11°C (53°F)89 mm (3.5 inches)81%moderate
November Weather8°C (46°F)147 mm (5.8 inches)87%moderate
December Weather5°C (41°F)186 mm (7.3 inches)87%low

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