nomadseason

August Weather in Mount Vernon, United States

Last updated: June 24, 2025

In August, the average temperature in Mount Vernon, United States is a warm 28°C (84°F), with daily highs reaching up to 39°C (102°F) and lows dipping to around 18°C (65°F). Visitors can expect 78 mm (3.1 in) of precipitation over approximately 8 days, accompanied by an average humidity level of 66%, making it a typically humid month.

August Temperature in Mount Vernon

In August, in Mount Vernon, the average temperature is a warm 28°C (84°F). Maximum temperatures can reach a scorching 39°C (102°F), while minimums can drop to a cool 18°C (65°F). This makes Mount Vernon a perfect destination for travelers seeking warm weather and plenty of sunshine.

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 28°C (84°F), with highs reaching up to 39°C (102°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec464959647380838378675551
Data source: Temperature data for Mount Vernon generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 78 mm (3.1 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 78 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9514213220217310172788013764106
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Mount Vernon

In Mount Vernon in August humidity is 66%. With an average temperature of 28°C (84°F), this humidity feels like a warm embrace, making it essential for travelers to stay hydrated and dress in light, breathable clothing to fully enjoy the experience.

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 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
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 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
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 Weather8°C (46°F)95 mm (3.8 inches)80%moderate
February Weather9°C (49°F)142 mm (5.6 inches)79%high
March Weather15°C (59°F)132 mm (5.2 inches)78%very high
April Weather18°C (64°F)202 mm (7.9 inches)78%very high
May Weather23°C (73°F)173 mm (6.8 inches)81%extreme
June Weather27°C (80°F)101 mm (4.0 inches)78%extreme
July Weather29°C (84°F)72 mm (2.8 inches)73%extreme
August Weather28°C (84°F)78 mm (3.1 inches)66%extreme
September Weather26°C (79°F)80 mm (3.2 inches)65%very high
October Weather19°C (67°F)137 mm (5.4 inches)72%very high
November Weather13°C (55°F)63 mm (2.5 inches)82%high
December Weather10°C (51°F)105 mm (4.2 inches)87%moderate

Compare Mount Vernon's Climate with Cities Worldwide