Climate and monthly weather forecast
Mount Vernon, MO

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Weather in January

January, like December, in Mount Vernon, Missouri, is an icy winter month, with an average temperature varying between 26.6°F (-3°C) and 42.3°F (5.7°C). During the coldest month, January, temperatures average a high of 42.3°F (5.7°C) and a low of 26.6°F (-3°C). Weather in January »

Weather in February

February, the last month of the winter in Mount Vernon, is a chilly month, with an average temperature ranging between max 46°F (7.8°C) and min 30.2°F (-1°C). Mount Vernon's average high-temperature in February is a frosty 46°F (7.8°C), indicating a subtle variation from January. Weather in February »

Weather in March

The first month of the spring, March, is a moderate month in Mount Vernon, Missouri, with an average temperature varying between 39.4°F (4.1°C) and 56.8°F (13.8°C). The beginning of March signals a rise in the average high-temperature, moving from a chilly 46°F (7.8°C) in February to a moderate 56.8°F (13.8°C). Weather in March »

Weather in April

April is a comfortable spring month in Mount Vernon, Missouri, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 47.7°F (8.7°C). April brings an increase in the average high-temperature, progressing from 56.8°F (13.8°C) in March to a still refreshing 66.7°F (19.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Mount Vernon, Missouri, with an average temperature varying between 75.7°F (24.3°C) and 56.5°F (13.6°C). May indicates a change in the average high-temperature, moving up from an enjoyable 66.7°F (19.3°C) in April to a moderately hot 75.7°F (24.3°C). Weather in May »

Weather in June

June, the first month of the summer in Mount Vernon, is still a warm month, with an average temperature fluctuating between 85.8°F (29.9°C) and 66.2°F (19°C). The onset of June brings a temperature shift, with the average high-temperature moving from a moderately hot 75.7°F (24.3°C) in May to a still warm 85.8°F (29.9°C). Weather in June »

Weather in July

July in Mount Vernon, Missouri, is a hot summer month, with an average temperature varying between 88.7°F (31.5°C) and 68.9°F (20.5°C). July, marked by an average high-temperature of 88.7°F (31.5°C) and a low-temperature of 68.9°F (20.5°C), is the warmest month. July's average heat index is estimated at a blisteringly hot 104°F (40°C). Weather in July »

Weather in August

August, the last month of the summer in Mount Vernon, is another hot month, with temperature in the range of an average high of 87.1°F (30.6°C) and an average low of 66.7°F (19.3°C). During August, Mount Vernon observes a subtle ascent to a still tropical 87.1°F (30.6°C) from July's 88.7°F (31.5°C) in the average high-temperature. 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 varying between 60.6°F (15.9°C) and 79.9°F (26.6°C). Mount Vernon observes a small decrease in the average high-temperature with the arrival of September, falling from August's tropical 87.1°F (30.6°C) to a warm 79.9°F (26.6°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Mount Vernon, Missouri, with an average temperature ranging between min 48.7°F (9.3°C) and max 67.1°F (19.5°C). The arrival of October indicates a decrease in the average high-temperature, moving from a moderately hot 79.9°F (26.6°C) in September to a comfortable 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, Missouri, with an average temperature ranging between max 55.2°F (12.9°C) and min 38.3°F (3.5°C). With November's arrival, Mount Vernon sees a decrease in average high-temperatures, moving from an enjoyable 67.1°F (19.5°C) in October to a fresh 55.2°F (12.9°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Mount Vernon, Missouri, with an average temperature varying between 30.7°F (-0.7°C) and 45.5°F (7.5°C). A subtle decrease in the average high-temperature marks December, falling from November's fresh 55.2°F (12.9°C) to a frosty 45.5°F (7.5°C). Weather in December »
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Frequently asked questions

What is the coldest time of year in Mount Vernon?

Mount Vernon, Missouri, experiences its average lowest temperatures in January, reaching a peak of 42.3°F (5.7°C) and a minimum of 26.6°F (-3°C).

What is the least humid month in Mount Vernon?

January, July, August and October, with an average relative humidity of 73%, are the least humid months.

How much does it rain in Mount Vernon?

Throughout the year, in Mount Vernon, Missouri, there are 155.3 rainfall days, and 35.59" (904mm) of precipitation is accumulated.

When does it snow in Mount Vernon?

Months with snowfall are January through May, November and December.

How much does it snow in Mount Vernon?

In Mount Vernon, during the entire year, snow falls for 17.9 days and aggregates up to 6.93" (176mm) of snow.

What is the month with the least sunshine in Mount Vernon?

With an average of 5.3h of sunshine, January has the least sunshine of the year.

What are the months with the lowest UV index in Mount Vernon?

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

What is the driest month in Mount Vernon?

February is the month with the least rainfall. Rain falls for 9 days and accumulates 1.69" (43mm) of precipitation.

When does it snow the most in Mount Vernon?

February is the month with the most snowfall. Snow falls for 5.3 days and accumulates 2.24" (57mm) of snow.

When is Daylight Saving Time (DST) in Mount Vernon?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mount Vernon, Missouri, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the most humid month in Mount Vernon?

May is the most humid month in Mount Vernon, Missouri, with an average relative humidity of 78%.

What is the rainiest month in Mount Vernon?

The month with the most rainfall is May, when the rain falls for 17.8 days and typically aggregates up to 5.31" (135mm) of precipitation.

What are the months with the highest UV index in Mount Vernon?

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

When it does not snow in Mount Vernon?

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

When are the longest days in Mount Vernon?

The month with the longest days in Mount Vernon is June, with an average of 14h and 42min of daylight.

What month has the most sunshine in Mount Vernon?

June has the most sunshine of the year in Mount Vernon, Missouri, with an average of 10.7h of sunshine.

What is the hottest time of year in Mount Vernon?

July, marked by an average high-temperature of 88.7°F (31.5°C) and a low-temperature of 68.9°F (20.5°C), is the warmest month.

What is the month with the shortest days in Mount Vernon?

December has the shortest days of the year, with an average of 9h and 42min of daylight.

Average temperature
Mount Vernon, MO

Average temperature - Mount Vernon, MO

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (42.3°F).

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

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Average pressure
Mount Vernon, MO

Average pressure - Mount Vernon, MO

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).

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Average wind speed
Mount Vernon, MO

Average wind speed - Mount Vernon, MO

The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity
Mount Vernon, MO

Average humidity - Mount Vernon, MO

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).

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Average rainfall
Mount Vernon, MO

Average rainfall - Mount Vernon, MO

The wettest month (with the highest rainfall) is May (5.31").
The driest month (with the least rainfall) is February (1.69").

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Average rainfall days
Mount Vernon, MO

Average rainfall days - Mount Vernon, MO

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall
Mount Vernon, MO

Average snowfall - Mount Vernon, MO

The month with the highest snowfall is February (2.24").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days
Mount Vernon, MO

Average snowfall days - Mount Vernon, MO

The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Mount Vernon, MO

Average daylight / Average sunshine - Mount Vernon, MO

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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Average sunshine days
Mount Vernon, MO

Average sunshine days - Mount Vernon, MO

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (10.6 days).

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Average UV index
Mount Vernon, MO

Average UV index - Mount Vernon, MO

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).

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Average visibility
Mount Vernon, MO

Average visibility - Mount Vernon, MO

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

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Mount Vernon, Missouri, USA

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