December weather forecast
Napoleon, MO

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Weather in December

The first month of the winter, December, is still a cold month in Napoleon, Missouri, with an average temperature fluctuating between 27.1°F (-2.7°C) and 40.3°F (4.6°C).

Temperature

Napoleon's average high-temperature decreases in December, falling from a cool 52.3°F (11.3°C) in November to a wintry 40.3°F (4.6°C). Napoleon's nighttime temperature during December is consistently averaged at a freezing cold 27.1°F (-2.7°C).

Humidity

In December, the average relative humidity in Napoleon is 75%.

Rainfall

In Napoleon, in December, it is raining for 5.6 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 136.3 rainfall days, and 27.28" (693mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Napoleon are January through March, May, October through December. In Napoleon, in December, during 3.5 snowfall days, 1.14" (29mm) of snow is typically accumulated. Throughout the year, there are 16.7 snowfall days, and 8.86" (225mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December in Napoleon, sunrise is at 7:17 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:03 pm CST.

Sunshine

The average sunshine in December in Napoleon, Missouri, is 5.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

Is it cold in Napoleon during December?

In December, the average high-temperature and low-temperature are 40.3°F (4.6°C) and 27.1°F (-2.7°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 95°F (35°C).

What is the average humidity in December in Napoleon?

In Napoleon, the average relative humidity in December is 75%.

How much does it rain in Napoleon in December?

In Napoleon, in December, during 5.6 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

How many days does it snow in December in Napoleon?

In Napoleon, Missouri, in December, during 3.5 snowfall days, 1.14" (29mm) of snow is typically accumulated.

What is the month with the shortest days in Napoleon?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Napoleon have in December?

The average day length in December in Napoleon is 9h and 28min.

When are sunrise and sunset in December in Napoleon?

In December, on the first day of the month, sunrise is at 7:17 am and sunset at 4:54 pm. On the last day of the month, in Napoleon, sunrise is at 7:35 am and sunset at 5:03 pm CST.

How many hours of sunshine does Napoleon have in December?

The average sunshine duration in December in Napoleon is 5.2h.

What is the month with the lowest UV index in Napoleon?

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

How high is the UV index in December in Napoleon?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Napoleon, MO

Average temperature in December - Napoleon, MO
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in December
Napoleon, MO

Average pressure in December - Napoleon, MO
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in December
Napoleon, MO

Average wind speed in December - Napoleon, MO
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in December
Napoleon, MO

Average humidity in December - Napoleon, MO
  • Average humidity in December: 75%

The months with the highest relative humidity are May and June (79%).
The months with the lowest relative humidity are October and November (71%).

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Average rainfall in December
Napoleon, MO

Average rainfall in December - Napoleon, MO
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in December
Napoleon, MO

Average rainfall days in December - Napoleon, MO
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in December
Napoleon, MO

Average snowfall in December - Napoleon, MO
  • Average snowfall in December: 1.14"

The month with the highest snowfall is February (3.35").
The months with the least snowfall are April, June, July, August and September (0").

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Average snowfall days in December
Napoleon, MO

Average snowfall days in December - Napoleon, MO
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Napoleon, MO

Average daylight in December / Average sunshine in December - Napoleon, MO
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

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Average sunshine days in December
Napoleon, MO

Average sunshine days in December - Napoleon, MO
  • Average sunshine days in December: 22 days

The month with the most sunshine days is December (22 days).
The months with the least sunshine days are May and June (11.6 days).

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Average UV index in December
Napoleon, MO

Average UV index in December - Napoleon, MO
  • Average UV index in December: 2

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

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Average cloud cover in December
Napoleon, MO

Average cloud cover in December - Napoleon, MO
  • Average cloud cover in December: 42

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in December
Napoleon, MO

Average visibility in December - Napoleon, MO
  • Average visibility in December: 6mi

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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Napoleon, Missouri, USA

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