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August Weather in Mount Vernon, United States

Last updated: June 24, 2025

In Mount Vernon, United States, the average temperature in August hovers around 25°C (78°F). Expect a minimum of 13°C (55°F) and a maximum that can soar to 35°C (96°F). During this time, precipitation averages 80 mm (3.2 in) over 9 days, accompanied by an average humidity level of 76%.

August Temperature in Mount Vernon

In August in Mount Vernon, the average temperature is 25°C (78°F). Maximum temperatures can reach as high as 35°C (96°F), while minimums can drop to a chilly 13°C (55°F). This pleasant climate makes it an ideal destination for travelers seeking both warmth and variety in their outdoor activities.

August Weather in Mount Vernon: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Mount Vernon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mount Vernon, 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 (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec353948576977807773614541
Data source: Temperature data for Mount Vernon 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 Mount Vernon

In Mount Vernon in August, the total precipitation amount is 80 mm (3.2 in) over the course of 9 days.

August Precipitation Trends in Mount Vernon

The chart displays monthly precipitation patterns in Mount Vernon, 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 Mount Vernon, August typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec971141381201261137580791099092
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Mount Vernon

In Mount Vernon in August humidity is 76%. With an average temperature of 25°C (78°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick, causing travelers to seek shade and refreshment more often.

August Average Humidity in Mount Vernon

This chart illustrates the average monthly humidity levels in Mount Vernon, 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 Mount Vernon is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Mount Vernon

In Mount Vernon 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 Mount Vernon.

Maximum UV Index Levels in Mount Vernon for August

The chart shows the monthly maximum UV Index (UVI) for Mount Vernon 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 Mount Vernon typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710111110109753
Data source: Mount Vernon 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 Mount Vernon Compares to Other Months

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

This table compares monthly weather conditions in Mount Vernon, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)97 mm (3.8 inches)86%moderate
February Weather4°C (39°F)114 mm (4.5 inches)84%moderate
March Weather9°C (49°F)138 mm (5.4 inches)84%high
April Weather14°C (57°F)120 mm (4.7 inches)80%very high
May Weather20°C (69°F)126 mm (5.0 inches)82%extreme
June Weather25°C (77°F)113 mm (4.5 inches)83%extreme
July Weather27°C (80°F)75 mm (3.0 inches)79%very high
August Weather25°C (78°F)80 mm (3.2 inches)76%very high
September Weather23°C (73°F)79 mm (3.1 inches)75%very high
October Weather16°C (61°F)109 mm (4.3 inches)74%high
November Weather7°C (46°F)90 mm (3.5 inches)85%moderate
December Weather5°C (41°F)92 mm (3.6 inches)88%moderate

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