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August Weather in Lewisville, United States

Last updated: June 24, 2025

In Lewisville, United States, the average temperature in August hovers around 25°C (78°F). Expect a minimum of 13°C (56°F) and a maximum of 35°C (96°F) throughout the month. With an average precipitation amount of 114 mm (4.5 in) spread over 13 days, it's wise to prepare for occasional showers. The average humidity level is a comfortable 74%.

August Temperature in Lewisville

In August in Lewisville, the average temperature is 25°C (78°F). Maximums can reach 35°C (96°F), and minimums can be as low as 13°C (56°F). It's an ideal time for travelers to enjoy mild weather with opportunities for both warm days and cooler evenings.

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

The chart illustrates August temperature patterns in Lewisville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewisville, August typically has an average temperature of 25°C (78°F), with highs reaching up to 35°C (96°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652606975807773634945
Data source: Temperature data for Lewisville 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 Lewisville

In Lewisville in August, the total precipitation amount is 114 mm (4.5 in), distributed over the course of 13 days.

August Precipitation Trends in Lewisville

The chart displays monthly precipitation patterns in Lewisville, 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 Lewisville, August typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8311586117124918611413611686109
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Lewisville

In Lewisville in August humidity is 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

August Average Humidity in Lewisville

This chart illustrates the average monthly humidity levels in Lewisville, 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 Lewisville is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Lewisville

In Lewisville in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Lewisville.

Maximum UV Index Levels in Lewisville for August

The chart shows the monthly maximum UV Index (UVI) for Lewisville 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 Lewisville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
Data source: Lewisville 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 Lewisville Compares to Other Months

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

This table compares monthly weather conditions in Lewisville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)83 mm (3.3 inches)86%moderate
February Weather8°C (47°F)115 mm (4.5 inches)85%high
March Weather11°C (52°F)86 mm (3.4 inches)84%very high
April Weather16°C (60°F)117 mm (4.6 inches)82%very high
May Weather20°C (69°F)124 mm (4.9 inches)83%very high
June Weather24°C (76°F)91 mm (3.6 inches)82%extreme
July Weather27°C (80°F)86 mm (3.4 inches)80%very high
August Weather25°C (78°F)114 mm (4.5 inches)74%very high
September Weather23°C (73°F)136 mm (5.4 inches)75%very high
October Weather17°C (64°F)116 mm (4.6 inches)79%very high
November Weather9°C (49°F)86 mm (3.4 inches)87%moderate
December Weather7°C (45°F)109 mm (4.3 inches)87%moderate

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