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August Weather in Mount Vernon, United States

Last updated: June 24, 2025

In August, the average temperature in Mount Vernon, United States reaches a warm 27°C (82°F), with a minimum of 20°C (69°F) and a peak of 38°C (100°F). Expect 160 mm (6.3 in) of precipitation spread over 20 days, contributing to an average humidity level of 78%. Embrace the warmth and be prepared for some rain!

August Temperature in Mount Vernon

In August in Mount Vernon, the average temperature is 27°C (82°F), with maximums reaching 38°C (100°F) and minimums as low as 20°C (69°F). This warm climate makes it an ideal time for travelers seeking sunny adventures and 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 27°C (82°F), with highs reaching up to 38°C (100°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec525863677580828179725955
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 is 160 mm (6.3 in) over the course of 20 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 160 mm (6.3 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec1029810812014121014916013211965130
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 78%. With an average temperature of 27°C (82°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a sweaty affair and requiring frequent breaks for hydration.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%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.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111110864
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 Weather11°C (52°F)102 mm (4.0 inches)82%moderate
February Weather14°C (58°F)98 mm (3.9 inches)80%very high
March Weather17°C (63°F)108 mm (4.2 inches)80%very high
April Weather20°C (67°F)120 mm (4.7 inches)78%extreme
May Weather24°C (76°F)141 mm (5.6 inches)73%extreme
June Weather27°C (80°F)210 mm (8.3 inches)71%extreme
July Weather28°C (82°F)149 mm (5.9 inches)79%extreme
August Weather27°C (82°F)160 mm (6.3 inches)78%extreme
September Weather26°C (79°F)132 mm (5.2 inches)80%very high
October Weather22°C (72°F)119 mm (4.7 inches)76%very high
November Weather15°C (59°F)65 mm (2.6 inches)83%high
December Weather13°C (55°F)130 mm (5.1 inches)87%moderate

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