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October Weather in Mount Vernon, United States

Last updated: June 24, 2025

In October, the average temperature in Mount Vernon, United States hovers around 10°C (50°F). Expect a range from a chilly -2°C (28°F) to a warm 26°C (78°F). Prepare for wet weather, as 127 mm (5.0 in) of precipitation may fall over 11 days, accompanied by a high average humidity of 85%.

October Temperature in Mount Vernon

In October in Mount Vernon, the average temperature is 10°C (50°F), with a maximum that can reach 26°C (78°F) and a minimum that can drop to -2°C (28°F). Be sure to pack layers to stay comfortable while exploring the diverse climate!

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

The chart illustrates October 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, October typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (78°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec212330435565706962503625
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.

October Precipitation in Mount Vernon

In Mount Vernon in October, the precipitation amount is 127 mm (5.0 in), occurring over 11 days.

October Precipitation Trends in Mount Vernon

The chart displays monthly precipitation patterns in Mount Vernon, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Mount Vernon, October typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec83847312183741218370127110113
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Mount Vernon

In Mount Vernon in October, humidity is 85%. With an average temperature of 10°C (50°F), this humidity feels like a heavy, damp blanket surrounding you, making travel feel sluggish and uncomfortable as you navigate through the thick, moist air.

October Average Humidity in Mount Vernon

This chart illustrates the average monthly humidity levels in Mount Vernon, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Mount Vernon is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Mount Vernon

In Mount Vernon in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Mount Vernon.

Maximum UV Index Levels in Mount Vernon for October

The chart shows the monthly maximum UV Index (UVI) for Mount Vernon in October, 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 October, the maximum UV index in Mount Vernon typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
Data source: Mount Vernon October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)83 mm (3.2 inches)91%low
February Weather-5°C (23°F)84 mm (3.3 inches)89%moderate
March Weather-1°C (31°F)72 mm (2.9 inches)85%moderate
April Weather6°C (43°F)121 mm (4.8 inches)84%very high
May Weather13°C (55°F)83 mm (3.3 inches)78%very high
June Weather18°C (65°F)74 mm (2.9 inches)72%very high
July Weather21°C (70°F)121 mm (4.7 inches)75%very high
August Weather21°C (69°F)82 mm (3.2 inches)74%very high
September Weather17°C (62°F)70 mm (2.7 inches)77%high
October Weather10°C (50°F)127 mm (5.0 inches)85%moderate
November Weather2°C (36°F)110 mm (4.3 inches)86%moderate
December Weather-4°C (26°F)113 mm (4.4 inches)85%low

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