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 is high, marking the end of the year under a blanket of snow and twinkling lights.

Temperature

Bismarck sees a considerable decrease in average high-temperatures during December, falling from a wintry 38.7°F (3.7°C) in November to a subzero cold 23.2°F (-4.9°C). In the month of December, an average of 11.3°F (-11.5°C) marks the low-temperature in Bismarck.

Humidity

In December, the average relative humidity is 86%.

Rainfall

In Bismarck, North Dakota, during December, the rain falls for 3.6 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 105.9 rainfall days, and 15" (381mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Bismarck, in December, snow falls for 15.7 days, with typically accumulated 3.98" (101mm) of snow. In Bismarck, during the entire year, snow falls for 73.7 days and aggregates up to 23.11" (587mm) of snow.

Daylight

The month with the shortest days 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, the average sunshine in December is 4h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature during December are 23.2°F (-4.9°C) and 11.3°F (-11.5°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 84.2°F (29°C).

What is the average humidity in December?

In December, the average relative humidity is 86%.

How much does it rain in December?

In Bismarck, North Dakota, in December, during 3.6 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How many days does it snow in December in Bismarck?

In Bismarck, in December, snow falls for 15.7 days, with typically accumulated 3.98" (101mm) of snow.

What is the month with the shortest days?

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

What time are sunrise and sunset in December?

On the first day of December, 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 long on average sun shines in December in Bismarck?

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

What is the month with the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health threat from unsafe 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Bismarck, North Dakota, USA

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