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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 22°C (73°F), offering a pleasant climate for visitors. However, temperatures can dip to a cool 11°C (51°F) and soar to a warm 34°C (94°F). Expect an average rainfall of 83 mm (3.3 in) spread over 8 days, contributing to a relatively high average humidity of 77%. Perfect weather for enjoying the local scenery!

August Temperature in Mount Vernon

In August in Mount Vernon, the average temperature is 22°C (73°F). Maximums can reach 34°C (94°F) and minimums can be as low as 11°C (51°F). This pleasant climate makes Mount Vernon an ideal destination for travelers seeking both warmth and comfort.

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 22°C (73°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec212338486173767267523730
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 precipitation amount reaches 83 mm (3.3 in) over the course of 8 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 83 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4758738115012581831301364845
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 77%. With an average temperature of 22°C (73°F), this humidity feels like a warm, sticky embrace, making travel a bit uncomfortable but manageable as you explore the sights while seeking shade and refreshing drinks.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098633
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 Weather-6°C (21°F)47 mm (1.9 inches)81%moderate
February Weather-5°C (23°F)58 mm (2.3 inches)81%moderate
March Weather3°C (38°F)73 mm (2.9 inches)81%high
April Weather9°C (48°F)81 mm (3.2 inches)82%very high
May Weather16°C (62°F)150 mm (5.9 inches)78%very high
June Weather23°C (73°F)125 mm (4.9 inches)81%extreme
July Weather24°C (76°F)81 mm (3.2 inches)79%very high
August Weather22°C (73°F)83 mm (3.3 inches)77%very high
September Weather19°C (67°F)130 mm (5.1 inches)78%very high
October Weather11°C (53°F)136 mm (5.4 inches)78%high
November Weather3°C (38°F)48 mm (1.9 inches)87%moderate
December Weather-1°C (30°F)45 mm (1.8 inches)84%moderate

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