December weather forecast
Bismarck, ND

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The historical building of the State Capitol in Bismarck, North Dakota
The historical building of the State Capitol in Bismarck, North Dakota

Weather in December

December in Bismarck carries the full blast of winter with it. It's characterized by low temperatures, high humidity, and prominent snowfall. With temperatures nosediving from 23.2°F (-4.9°C) to 11.3°F (-11.5°C), the city sees the highest amount of snowfall at 3.98" (101mm), contributing to the winter wonderland ambiance. Despite the low temperatures, the holiday spirit in Bismarck is high, marking the end of the year under a blanket of snow and twinkling lights.

Temperature

Bismarck's weather undergoes a significant change with the arrival of December, as the average high-temperature drops from a cold 38.7°F (3.7°C) in November to a freezing cold 23.2°F (-4.9°C). Nighttime temperature experiences an average drop to a frigid cold 11.3°F (-11.5°C) in December.

Humidity

In Bismarck, the average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 3.6 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. In Bismarck, during the entire year, the rain falls for 105.9 days and collects up to 15" (381mm) of precipitation.

Snowfall

Months with snowfall in Bismarck, North Dakota, are January through May, October through December. In Bismarck, in December, snow falls for 15.7 days, with typically accumulated 3.98" (101mm) of snow. Throughout the year, there are 73.7 snowfall days, and 23.11" (587mm) of snow is accumulated.

Daylight

The month with the shortest days in Bismarck is December, with an average of 8h and 36min of daylight.
On the first day of the month, sunrise is at 8:08 am and sunset at 4:56 pm. On the last day of December, sunrise is at 8:28 am and sunset at 5:04 pm CST.

Sunshine

In Bismarck, North Dakota, the average sunshine in December is 4h.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 1 during December translates into the following guidance:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Frequently asked questions

How cold is it in Bismarck in December?

The high-temperature during December is 23.2°F (-4.9°C) and the low-temperature is 11.3°F (-11.5°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Bismarck?

In Bismarck, the average relative humidity in December is 86%.

How much does it rain in Bismarck in December?

In Bismarck, North Dakota, in December, it is raining for 3.6 days, with typically 0.75" (19mm) of accumulated precipitation.

How many days does it snow in December in Bismarck?

In Bismarck, during December, snow falls for 15.7 days and regularly aggregates up to 3.98" (101mm) of snow.

What is the month with the shortest days in Bismarck?

With an average of 8h and 36min of daylight, December has the shortest days of the year.

How many hours of daylight does Bismarck have in December?

In Bismarck, the average day length in December is 8h and 37min.

When is the sunrise / sunset in December in Bismarck?

On the first day of December in Bismarck, sunrise is at 8:08 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 8:28 am and sunset at 5:04 pm CST.

How many hours of sunshine does Bismarck have in December?

In Bismarck, North Dakota, the average sunshine duration in December is 4h.

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

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Bismarck.

What is the UV index intensity in December in Bismarck?

In December, the average daily maximum UV index in Bismarck is 1. A UV Index value of 2, and less, symbolizes 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
Bismarck, ND

Average temperature in December - Bismarck, ND
  • Average high temperature in December: 23.2°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (20.8°F).

  • Average low temperature in December: 11.3°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).

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Average pressure in December
Bismarck, ND

Average pressure in December - Bismarck, ND
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Bismarck, ND

Average wind speed in December - Bismarck, ND
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in December
Bismarck, ND

Average humidity in December - Bismarck, ND
  • Average humidity in December: 86%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in December
Bismarck, ND

Average rainfall in December - Bismarck, ND
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in December
Bismarck, ND

Average rainfall days in December - Bismarck, ND
  • Average rainfall days in December: 3.6 days

The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in December
Bismarck, ND

Average snowfall in December - Bismarck, ND
  • Average snowfall in December: 3.98"

The month with the highest snowfall is February (4.33").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Bismarck, ND

Average snowfall days in December - Bismarck, ND
  • Average snowfall days in December: 15.7 days

The month with the highest number of snowfall days is December (15.7 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
Bismarck, ND

Average daylight in December / Average sunshine in December - Bismarck, ND
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in December
Bismarck, ND

Average sunshine days in December - Bismarck, ND
  • Average sunshine days in December: 14.1 days

The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in December
Bismarck, ND

Average UV index in December - Bismarck, ND
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in December
Bismarck, ND

Average cloud cover in December - Bismarck, ND
  • Average cloud cover in December: 58

The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 21).

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Average visibility in December
Bismarck, ND

Average visibility in December - Bismarck, ND
  • Average visibility in December: 5mi

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

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Bismarck, North Dakota, USA

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