December weather forecast
Columbus, MT

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Weather in December

Finally, winter in Columbus, Montana, firmly establishes itself in December, following the weather patterns observed in November. December experiences a snowfall of 5.2" (132mm), offering a winter wonderland experience. The cold temperatures and light pressure bring about a peaceful and tranquil atmosphere, ideal for holiday celebrations. The number of daylight hours reaches its yearly minimum during this month. Short days and long nights, coupled with low temperatures, make this month the chilliest time of the year.

Temperature

In Columbus, the lowest average temperatures are observed in December, with a high of 30.9°F (-0.6°C) and a low of 17.8°F (-7.9°C).

Humidity

In Columbus, the average relative humidity in December is 74%.

Rainfall

In Columbus, during December, the rain falls for 6.8 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, in Columbus, there are 125.4 rainfall days, and 14.49" (368mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Columbus. In December, it is snowing for 11.5 days. Throughout December, 5.2" (132mm) of snow is accumulated. In Columbus, during the entire year, snow falls for 63.3 days and aggregates up to 39.09" (993mm) of snow.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year in Columbus.
On the first day of the month, sunrise is at 7:37 am and sunset at 4:34 pm. On the last day of December, in Columbus, sunrise is at 7:57 am and sunset at 4:43 pm MST.

Sunshine

February and December, with an average of 6.2h of sunshine, are months with the least sunshine in Columbus.

UV index

The months with the lowest UV index in Columbus are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the UV index of 2 transforms into the following advice:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
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Frequently asked questions

What part of the year is the coldest in Columbus?

Columbus's temperature records reveal December as the coldest month, marked by average highs of 30.9°F (-0.6°C) and lows of 17.8°F (-7.9°C).

How cold is December in Columbus?

The average high-temperature and low-temperature during December are 30.9°F (-0.6°C) and 17.8°F (-7.9°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 80.6°F (27°C).

What is the average humidity in December in Columbus?

In Columbus, Montana, the average relative humidity in December is 74%.

How many days does it rain in December in Columbus?

In Columbus, in December, it is raining for 6.8 days, with typically 0.71" (18mm) of accumulated precipitation.

How much does it snow in Columbus in December?

In December, in Columbus, it is snowing for 11.5 days. Throughout December, 5.2" (132mm) of snow is accumulated.

What is the month with the shortest days in Columbus?

With an average of 8h and 48min of daylight, December has the shortest days of the year in Columbus.

How many hours of daylight does Columbus have in December?

The average day length in December is 8h and 46min.

What time are sunrise and sunset in December in Columbus?

On the first day of December in Columbus, sunrise is at 7:37 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:43 pm MST.

What are the months with the least sunshine in Columbus?

February and December, with an average of 6.2h of sunshine, are months with the least sunshine in Columbus, Montana.

How many hours of sunshine does Columbus have in December?

In Columbus, the average sunshine duration in December is 6.2h.

When is the lowest UV index in Columbus?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Columbus.

How high is the UV index in December in Columbus?

In December, the average daily maximum UV index in Columbus, Montana, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
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
Columbus, MT

Average temperature in December - Columbus, MT
  • Average high temperature in December: 30.9°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (30.9°F).

  • Average low temperature in December: 17.8°F

The month with the highest average low temperature is August (57.2°F).
The coldest month (with the lowest average low temperature) is February (17.4°F).

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Average pressure in December
Columbus, MT

Average pressure in December - Columbus, MT
  • Average pressure in December: 30.15"Hg

The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Columbus, MT

Average wind speed in December - Columbus, MT
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in December
Columbus, MT

Average humidity in December - Columbus, MT
  • Average humidity in December: 74%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in December
Columbus, MT

Average rainfall in December - Columbus, MT
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.63").

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Average rainfall days in December
Columbus, MT

Average rainfall days in December - Columbus, MT
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (6.7 days).

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Average snowfall in December
Columbus, MT

Average snowfall in December - Columbus, MT
  • Average snowfall in December: 5.2"

The month with the highest snowfall is February (7.36").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Columbus, MT

Average snowfall days in December - Columbus, MT
  • Average snowfall days in December: 11.5 days

The month with the highest number of snowfall days is February (13.4 days).
The 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
Columbus, MT

Average daylight in December / Average sunshine in December - Columbus, MT
  • Average daylight in December: 8h and 5min

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

  • Average sunshine in December: 6h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 12min).

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Average sunshine days in December
Columbus, MT

Average sunshine days in December - Columbus, MT
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is September (18.9 days).
The month with the least sunshine days is April (9.5 days).

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Average UV index in December
Columbus, MT

Average UV index in December - Columbus, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Columbus, MT

Average cloud cover in December - Columbus, MT
  • Average cloud cover in December: 34

The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 14).

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Average visibility in December
Columbus, MT

Average visibility in December - Columbus, MT
  • Average visibility in December: 6mi

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

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Columbus, Montana, USA

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