December weather forecast
Hannibal, MO

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The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri
The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri

Weather in December

The year ends in Hannibal with December bringing back winter's characteristics - cold temperatures, increased snowfall, and significantly less daylight. The city dons a festive look amid shorter days and longer nights. Snowfall increases from November's, making December one of the snowier months along with January. December endows Hannibal with a recorded snowfall of 1.26" (32mm). Despite the chill, locals and visitors enjoy the holiday season illuminated by festive lights against a snowy canvas that is December in Hannibal.

Temperature

A shift in the average high-temperature occurs in December in Hannibal, Missouri, reducing from a fresh 51.4°F (10.8°C) in November to a cold 39.6°F (4.2°C). Throughout December, Hannibal witnesses a nighttime temperature average of 27.1°F (-2.7°C).

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Hannibal, in December, it is raining for 6.9 days, with typically 1.34" (34mm) of accumulated precipitation. In Hannibal, during the entire year, the rain falls for 136 days and collects up to 25" (635mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Hannibal, in December, snow falls for 4.2 days, with typically accumulated 1.26" (32mm) of snow. Throughout the year, in Hannibal, there are 20 snowfall days, and 8.5" (216mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:51 pm CST.

Sunshine

In Hannibal, Missouri, the average sunshine in December is 4.9h.

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 of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, an average UV index of 2 transforms into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

Is it cold in Hannibal during December?

An average high-temperature, in December, in Hannibal, is 39.6°F (4.2°C) and the average low-temperature is 27.1°F (-2.7°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 93.2°F (34°C).

What is the average humidity in December in Hannibal?

In Hannibal, the average relative humidity in December is 77%.

How much does it rain in Hannibal in December?

In Hannibal, in December, during 6.9 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

How much does it snow in Hannibal in December?

In Hannibal, in December, during 4.2 snowfall days, 1.26" (32mm) of snow is typically accumulated.

What is the month with the shortest days in Hannibal?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December in Hannibal?

In Hannibal, the average day length in December is 9h and 25min.

When are sunrise and sunset in December in Hannibal?

On the first day of December in Hannibal, Missouri, sunrise is at 7:07 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:51 pm CST.

How many hours of sunshine does Hannibal have in December?

In December, the average sunshine duration in Hannibal, Missouri, is 4.9h.

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

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

What is the UV index intensity in December in Hannibal?

In Hannibal, Missouri, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Hannibal, MO

Average temperature in December - Hannibal, MO
  • Average high temperature in December: 39.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in December
Hannibal, MO

Average pressure in December - Hannibal, MO
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Hannibal, MO

Average wind speed in December - Hannibal, MO
  • Average wind speed in December: 9.5mph

The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in December
Hannibal, MO

Average humidity in December - Hannibal, MO
  • Average humidity in December: 77%

The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Hannibal, MO

Average rainfall in December - Hannibal, MO
  • Average rainfall in December: 1.34"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").

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Average rainfall days in December
Hannibal, MO

Average rainfall days in December - Hannibal, MO
  • Average rainfall days in December: 6.9 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in December
Hannibal, MO

Average snowfall in December - Hannibal, MO
  • Average snowfall in December: 1.26"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Hannibal, MO

Average snowfall days in December - Hannibal, MO
  • Average snowfall days in December: 4.2 days

The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Hannibal, MO
  • Average daylight in December: 9h and 2min

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 24min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in December
Hannibal, MO

Average sunshine days in December - Hannibal, MO
  • Average sunshine days in December: 20.3 days

The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).

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Average UV index in December
Hannibal, MO

Average UV index in December - Hannibal, 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
Hannibal, MO

Average cloud cover in December - Hannibal, MO
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in December
Hannibal, MO

Average visibility in December - Hannibal, 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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Hannibal, Missouri, USA

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