December weather forecast
Jefferson City, MO

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The State Capitol building surrounded by a beautiful park in Jefferson City, Missouri
The State Capitol building surrounded by a beautiful park in Jefferson City, Missouri

Weather in December

December encapsulates the end of the climatic cycle, welcoming back the gentle caress of the winter chill. The onset of the white frost is accompanied by an increase in cloudy and snowfall frequency. Jefferson City undergoes a metamorphosis, with temperature stooping as low as 29.1°F (-1.6°C) compared to the year's rest period. Daylight hours contract considerably, making nights the dominant feature of the climatic rhythm. The enduring charm of December perpetuates the cold beauty of winter, rounding off the year with a spectral display of the snowy mantle.

Temperature

The onset of December in Jefferson City is marked by a decrease in temperature, transitioning from a fresh 53.8°F (12.1°C) in November to a frosty 42.8°F (6°C). Jefferson City encounters an average low-temperature of 29.1°F (-1.6°C) during December nights.

Humidity

The average relative humidity in December in Jefferson City is 76%.

Rainfall

In Jefferson City, Missouri, during December, the rain falls for 4.6 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Jefferson City, during the entire year, the rain falls for 93.7 days and collects up to 9.29" (236mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Jefferson City, during December, snow falls for 2.8 days and regularly aggregates up to 0.43" (11mm) of snow. In Jefferson City, during the entire year, snow falls for 14.9 days and aggregates up to 2.13" (54mm) of snow.

Daylight

The month with the shortest days in Jefferson City, Missouri, is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:08 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:57 pm CST.

Sunshine

In December, the average sunshine is 5.1h.

UV index

The months with the lowest UV index in Jefferson City are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.

Frequently asked questions

Is December cold in Jefferson City?

An average high-temperature, in December, in Jefferson City, is 42.8°F (6°C) and the average low-temperature is 29.1°F (-1.6°C). The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in August is evaluated at 100.4°F (38°C).

What is the average humidity in December in Jefferson City?

In Jefferson City, Missouri, the average relative humidity in December is 76%.

How many days does it rain in December in Jefferson City?

In December, in Jefferson City, the rain falls for 4.6 days. Throughout December, 0.51" (13mm) of precipitation is accumulated.

How much does it snow in Jefferson City in December?

In Jefferson City, Missouri, during December, snow falls for 2.8 days and regularly aggregates up to 0.43" (11mm) of snow.

What is the month with the shortest days in Jefferson City?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Jefferson City, Missouri.

How many hours of daylight does Jefferson City have in December?

In Jefferson City, Missouri, the average day length in December is 9h and 32min.

When are sunrise and sunset in December in Jefferson City?

On the first day of December in Jefferson City, sunrise is at 7:08 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:57 pm CST.

How long on average sun shines in December in Jefferson City?

In December, the average sunshine duration is 5.1h.

When is the lowest UV index in Jefferson City?

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

What is the UV index reading in December in Jefferson City?

In Jefferson City, Missouri, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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
Jefferson City, MO

Average temperature in December - Jefferson City, MO
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in December: 29.1°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in December
Jefferson City, MO

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Jefferson City, MO

Average wind speed in December - Jefferson City, MO
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in December
Jefferson City, MO

Average humidity in December - Jefferson City, MO
  • Average humidity in December: 76%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Jefferson City, MO

Average rainfall in December - Jefferson City, MO
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is May (1.3").
The driest month (with the least rainfall) is November (0.47").

Average rainfall days in December
Jefferson City, MO

Average rainfall days in December - Jefferson City, MO
  • Average rainfall days in December: 4.6 days

The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is January (4 days).

Average snowfall in December
Jefferson City, MO

Average snowfall in December - Jefferson City, MO
  • Average snowfall in December: 0.43"

The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Jefferson City, MO

Average snowfall days in December - Jefferson City, MO
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Jefferson City, MO

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

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).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Jefferson City, MO

Average sunshine days in December - Jefferson City, MO
  • Average sunshine days in December: 23.7 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (16.7 days).

Average UV index in December
Jefferson City, MO

Average UV index in December - Jefferson City, 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).

Average cloud cover in December
Jefferson City, MO

Average cloud cover in December - Jefferson City, MO
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in December
Jefferson City, MO

Average visibility in December - Jefferson City, 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).

Jefferson City, Missouri, USA

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