December weather forecast and climate
Williston, ND

Weather in December

December, the first month of the winter, in Williston, is still a freezing cold month, with average temperature fluctuating between 10.6°F (-11.9°C) and 22.1°F (-5.5°C).

Temperature

In December, the average high-temperature declines considerably, from a cold 37.4°F (3°C) in November, to a freezing cold 22.1°F (-5.5°C). The average low-temperature, in Williston, North Dakota, is 10.6°F (-11.9°C).

Humidity

The average relative humidity in December is 87%.

Rainfall

The month with the least rainfall is December when the rain falls for 2.5 days and typically collects 0.35" (9mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Williston. In Williston, North Dakota, during December, snow falls for 9 days and regularly aggregates up to 1.93" (49mm) of snow. Throughout the year, in Williston, there are 53.3 snowfall days, and 13.86" (352mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Williston, with an average of 8.4h of daylight.

Sunshine

With an average of 4h of sunshine, December has the least sunshine of the year in Williston.

UV index

Months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 1 in December interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Williston?

In Williston, in December, the average high-temperature is 22.1°F (-5.5°C), and the average low-temperature is 10.6°F (-11.9°C).

What is the average humidity in December in Williston?

The average relative humidity in December in Williston is 87%.

How many days does it rain in December in Williston?

In Williston, in December, it is raining for 2.5 days, with typically 0.35" (9mm) of accumulated precipitation.

What is the driest month in Williston?

December is the month with the least rainfall in Williston, North Dakota. Rain falls for 2.5 days and accumulates 0.35" (9mm) of precipitation.

How many days does it snow in December in Williston?

In Williston, North Dakota, during December, snow falls for 9 days and regularly aggregates up to 1.93" (49mm) of snow.

What is the month with the shortest days in Williston?

With an average of 8.4h of daylight, December has the shortest days of the year.

How many hours of daylight does Williston have in December?

In Williston, the average length of the day in December is 8.4h.

What is the month with the least sunshine in Williston?

December has the least sunshine of the year, with an average of 4h of sunshine.

How long on average sun shines in December in Williston?

The average sunshine in December in Williston, North Dakota, is 4h.

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

February and December, with an average maximum UV index of 1, are months with the lowest UV index in Williston, North Dakota.

How high is the UV index in December in Williston?

In Williston, North Dakota, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Williston, ND

Average temperature in December - Williston, ND
  • Average high temperature in December: 22.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (20.8°F).

  • Average low temperature in December: 10.6°F

The month with the highest average low temperature is July (61.3°F).
The coldest months (with the lowest average low temperature) are January and February (7°F).

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Average pressure in December
Williston, ND

Average pressure in December - Williston, ND
  • Average pressure in December: 30.14"

The month with the highest atmospheric pressure is February (30.17").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in December
Williston, ND

Average wind speed in December - Williston, ND
  • Average wind speed in December: 9.7mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (8.9mph).

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Average humidity in December
Williston, ND

Average humidity in December - Williston, ND
  • Average humidity in December: 87%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (48%).

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Average rainfall in December
Williston, ND

Average rainfall in December - Williston, ND
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.35").

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Average rainfall days in December
Williston, ND

Average rainfall days in December - Williston, ND
  • Average rainfall days in December: 2.5 days

The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is December (2.5 days).

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Average snowfall in December
Williston, ND

Average snowfall in December - Williston, ND
  • Average snowfall in December: 1.93"

The month with the highest snowfall is February (3.07").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Williston, ND

Average snowfall days in December - Williston, ND
  • Average snowfall days in December: 9 days

The month with the highest number of snowfall days is February (12.3 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Williston, ND

Average daylight in December / Average sunshine in December - Williston, ND
  • Average daylight in December: 8.4h

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in December: 4h

The month with the most sunshine is July (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 4h).

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Average sunshine days in December
Williston, ND

Average sunshine days in December - Williston, ND
  • Average sunshine days in December: 20.4 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (13.5 days).

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Average UV index in December
Williston, ND

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in December
Williston, ND

Average cloud cover in December - Williston, ND
  • Average cloud cover in December: 57

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 19).

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Average visibility in December
Williston, ND

Average visibility in December - Williston, ND
  • Average visibility in December: 6mi

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

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