December weather forecast
Rolla, ND

Weather in December

December, the first month of the winter in Rolla, is still a freezing cold month, with temperature in the range of an average high of 16.7°F (-8.5°C) and an average low of 5.9°F (-14.5°C).

Temperature

In December, the average high-temperature plummets from a cold 32.2°F (0.1°C) in November to a freezing cold 16.7°F (-8.5°C). In December, in Rolla, North Dakota, the average low-temperature is 5.9°F (-14.5°C).

Humidity

In December, the average relative humidity is 91%.

Rainfall

In Rolla, North Dakota, during 2.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Rolla, North Dakota, during the entire year, the rain falls for 110.9 days and collects up to 17.95" (456mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Rolla. In December, it is snowing for 15.7 days. Throughout December, 3.98" (101mm) of snow is accumulated. In Rolla, during the entire year, snow falls for 86.8 days and aggregates up to 23.78" (604mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 20min of daylight.
On the first day of the month, sunrise is at 8:10 am and sunset at 4:44 pm. On the last day of December, in Rolla, sunrise is at 8:31 am and sunset at 4:51 pm CST.

Sunshine

In December, the average sunshine is 3.2h.

UV index

The months with the lowest UV index in Rolla are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Rolla?

In Rolla, North Dakota, the average relative humidity in December is 91%.

How much does it rain in Rolla in December?

In Rolla, in December, during 2.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How many days does it snow in December in Rolla?

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

What is the month with the shortest days in Rolla?

With an average of 8h and 20min of daylight, December has the shortest days of the year in Rolla, North Dakota.

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

In Rolla, North Dakota, the average day length in December is 8h and 20min.

When are sunrise and sunset in December in Rolla?

In December, on the first day of the month, sunrise is at 8:10 am and sunset at 4:44 pm. On the last day of the month, in Rolla, sunrise is at 8:31 am and sunset at 4:51 pm CST.

How many hours of sunshine does Rolla have in December?

In Rolla, North Dakota, the average sunshine duration in December is 3.2h.

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

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

What is the UV index intensity in December in Rolla?

In December, the average daily maximum UV index in Rolla, North Dakota, is 1. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.

Average temperature in December
Rolla, ND

Average temperature in December - Rolla, ND
  • Average high temperature in December: 16.7°F

The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is January (14.2°F).

  • Average low temperature in December: 5.9°F

The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (0.5°F).

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Average pressure in December
Rolla, ND

Average pressure in December - Rolla, ND
  • Average pressure in December: 30.13"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
Rolla, ND

Average wind speed in December - Rolla, ND
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average humidity in December
Rolla, ND

Average humidity in December - Rolla, ND
  • Average humidity in December: 91%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (60%).

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Average rainfall in December
Rolla, ND

Average rainfall in December - Rolla, ND
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is June (3.27").
The driest month (with the least rainfall) is February (0.43").

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Average rainfall days in December
Rolla, ND

Average rainfall days in December - Rolla, ND
  • Average rainfall days in December: 2.7 days

The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2 days).

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Average snowfall in December
Rolla, ND

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

The month with the highest snowfall is November (4.29").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Rolla, ND

Average snowfall days in December - Rolla, 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
Rolla, ND

Average daylight in December / Average sunshine in December - Rolla, ND
  • Average daylight in December: 8h and 20min

The month with the longest days is June (Average daylight: 16h and 7min).
The month with the shortest days is December (Average daylight: 8h and 20min).

  • Average sunshine in December: 3.2h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 3.1h).

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Average sunshine days in December
Rolla, ND

Average sunshine days in December - Rolla, ND
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is June (8.1 days).

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Average UV index in December
Rolla, ND

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

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in December
Rolla, ND

Average cloud cover in December - Rolla, ND
  • Average cloud cover in December: 67

The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in December
Rolla, ND

Average visibility in December - Rolla, 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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