Climate and monthly weather forecast
Mount Vernon, VA

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Weather in January

January, the same as December, is a wintry winter month in Mount Vernon, Virginia, with an average temperature fluctuating between 40.6°F (4.8°C) and 27.7°F (-2.4°C). Mount Vernon records the coldest temperatures in January, averaging a high of 40.6°F (4.8°C) and a low of 27.7°F (-2.4°C). Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Mount Vernon, Virginia, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 30.2°F (-1°C). A minimal variation is noted in Mount Vernon's average high-temperature at the onset of February, reaching a frosty 45.1°F (7.3°C) from January's 40.6°F (4.8°C). Weather in February »

Weather in March

March, the first month of the spring in Mount Vernon, is a cool month, with an average temperature varying between 53.2°F (11.8°C) and 37.4°F (3°C). March introduces a minor temperature shift, with average high-temperatures adjusting from February's chilly 45.1°F (7.3°C) to a cool 53.2°F (11.8°C). Weather in March »

Weather in April

April is a comfortable spring month in Mount Vernon, Virginia, with an average temperature varying between 47.3°F (8.5°C) and 65.1°F (18.4°C). Mount Vernon's transition into April is marked by a temperature shift, moving from a cool 53.2°F (11.8°C) in March to an enjoyable 65.1°F (18.4°C). Weather in April »

Weather in May

May, the last month of the spring in Mount Vernon, is a moderately hot month, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 74.7°F (23.7°C). In Mount Vernon, the average high-temperature in May increases from a refreshing 65.1°F (18.4°C) in April to a warm 74.7°F (23.7°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Mount Vernon, Virginia, with an average temperature ranging between min 64.2°F (17.9°C) and max 82.8°F (28.2°C). The commencement of June sees a minor shift in the average high-temperature, moving from a moderately hot 74.7°F (23.7°C) in May to a still warm 82.8°F (28.2°C). Weather in June »

Weather in July

July in Mount Vernon, Virginia, is a tropical summer month, with temperature in the range of an average high of 87.8°F (31°C) and an average low of 69.1°F (20.6°C). Mount Vernon's July weather, with an average high temperature of 87.8°F (31°C) and an average low temperature of 69.1°F (20.6°C), tends to be the warmest of the year. During July, the heat index is estimated at a sweltering 100.4°F (38°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Mount Vernon, Virginia, with an average temperature ranging between min 67.6°F (19.8°C) and max 85.6°F (29.8°C). August's onset brings an average high-temperature of a moderately hot 85.6°F (29.8°C), showing a minute difference from July's 87.8°F (31°C). Weather in August »

Weather in September

September, the first month of the autumn in Mount Vernon, is also a moderately hot month, with an average temperature fluctuating between 78.6°F (25.9°C) and 61.7°F (16.5°C). In September, the average high-temperature marginally decreases from a moderately hot 85.6°F (29.8°C) in August to a still warm 78.6°F (25.9°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Mount Vernon, Virginia, with an average temperature fluctuating between 67.1°F (19.5°C) and 51.3°F (10.7°C). Mount Vernon in October demonstrates a small temperature transition, adjusting from an average high of a moderately hot 78.6°F (25.9°C) in September to a refreshing 67.1°F (19.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Mount Vernon, Virginia, with an average temperature ranging between min 39.9°F (4.4°C) and max 55°F (12.8°C). The start of November involves a temperature drop, moving from a refreshing 67.1°F (19.5°C) in October to a fresh 55°F (12.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Mount Vernon, Virginia, with an average temperature ranging between max 46.2°F (7.9°C) and min 34°F (1.1°C). December marks a gentle change in average high-temperature, declining from November's fresh 55°F (12.8°C) to a frosty 46.2°F (7.9°C). Weather in December »
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

January, noted for its average high-temperature of 40.6°F (4.8°C) and an average low-temperature of 27.7°F (-2.4°C), is considered the coldest month.

How many days does it rain?

Throughout the year, there are 158.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

When does it snow?

January through April, November and December are months with snowfall in Mount Vernon.

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 4.5 days and accumulates 2.48" (63mm) of snow.

How many days does it snow?

In Mount Vernon, during the entire year, snow falls for 14.4 days and aggregates up to 7.56" (192mm) of snow.

What is the month with the lowest UV index?

The months with the lowest UV index are January and December, with an average maximum UV index of 2.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 5.1h of sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month?

The months with the lowest humidity are April and July, with an average relative humidity of 71%.

What are the most humid months?

May, October and December, with an average relative humidity of 76%, are most humid months.

When it does not snow?

In Mount Vernon, snow does not fall in May through October.

What is the month with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

When are the longest days?

With an average of 14h and 48min of daylight, June has the longest days of the year.

What is the warmest month?

Mount Vernon's warmest weather arrives in July, when temperatures average a high of 87.8°F (31°C) and a low of 69.1°F (20.6°C).

What month has the most sunshine?

The month with the most sunshine is July, with an average of 10.8h of sunshine.

What is the wettest month in Mount Vernon?

August is the month with the most rainfall in Mount Vernon, Virginia. Rain falls for 15.9 days and accumulates 3.43" (87mm) of precipitation.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.9 days and typically collects 1.93" (49mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

Average temperature
Mount Vernon, VA

Average temperature - Mount Vernon, VA

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (40.6°F).

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure
Mount Vernon, VA

Average pressure - Mount Vernon, VA

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed
Mount Vernon, VA

Average wind speed - Mount Vernon, VA

The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity
Mount Vernon, VA

Average humidity - Mount Vernon, VA

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

Average rainfall
Mount Vernon, VA

Average rainfall - Mount Vernon, VA

The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days
Mount Vernon, VA

Average rainfall days - Mount Vernon, VA

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).

Average snowfall
Mount Vernon, VA

Average snowfall - Mount Vernon, VA

The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Mount Vernon, VA

Average snowfall days - Mount Vernon, VA

The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Mount Vernon, VA

Average daylight / Average sunshine - Mount Vernon, VA

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days
Mount Vernon, VA

Average sunshine days - Mount Vernon, VA

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.5 days).

Average UV index
Mount Vernon, VA

Average UV index - Mount Vernon, VA

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

Average visibility
Mount Vernon, VA

Average visibility - Mount Vernon, VA

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Mount Vernon, Virginia, USA

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