December weather forecast and climate
Rolla, ND

Weather in December

December, the first month of the winter, in Rolla, is also a subzero 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, the average low-temperature is 5.9°F (-14.5°C).

Humidity

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

Rainfall

In December, in Rolla, North Dakota, the rain falls for 2.7 days. Throughout December, 0.71" (18mm) of precipitation is 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 Rolla, during December, snow falls for 15.7 days and regularly aggregates up to 3.98" (101mm) of snow. 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 8.3h of daylight.

Sunshine

The average sunshine in December is 3.2h.

UV index

Months with the lowest UV index in Rolla are January, 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 the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 1 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Rolla?

In December, in Rolla, the average high-temperature is 16.7°F (-8.5°C), and the average low-temperature is 5.9°F (-14.5°C).

What is the average humidity in December in Rolla?

The average relative humidity in December in Rolla is 91%.

How many days does it rain in December in Rolla?

In Rolla, North Dakota, 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, 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?

The month with the shortest days in Rolla is December, with an average of 8.3h of daylight.

How many hours of daylight does Rolla have in December?

In Rolla, the average length of the day in December is 8.3h.

How many hours of sunshine does Rolla have in December?

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

When is the lowest UV index in Rolla?

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

How high is the UV index in December in Rolla?

The average daily maximum UV index in December in Rolla is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.

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"

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

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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").
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).
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: 8.3h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • 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

Months with the highest UV index are June, July and August (UV index 5).
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

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

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