December weather forecast and climate
Columbia Falls, MT

December, the first month of the winter, in Columbia Falls, is still a freezing cold month, with average temperature fluctuating between 25.7°F (-3.5°C) and 13.8°F (-10.1°C).

Temperature

December is the coldest month, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 13.8°F (-10.1°C).

Humidity

In December, the average relative humidity is 91%.

Rainfall

In December, the rain falls for 8.9 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. In Columbia Falls, during the entire year, the rain falls for 126.4 days and collects up to 11.22" (285mm) of precipitation.

Snowfall

Months with snowfall in Columbia Falls are January through May, September through December. In Columbia Falls, during December, snow falls for 19.1 days and regularly aggregates up to 6.77" (172mm) of snow. In Columbia Falls, Montana, during the entire year, snow falls for 97 days, and aggregates up to 33.86" (860mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8.4h of daylight.

Sunshine

In December, the average sunshine is 4h.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Columbia Falls, Montana. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the coldest month in Columbia Falls?

With an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 13.8°F (-10.1°C), December is the coldest month in Columbia Falls, Montana.

What is the temperature in December in Columbia Falls?

In December, in Columbia Falls, Montana, the average high-temperature is 25.7°F (-3.5°C), and the average low-temperature is 13.8°F (-10.1°C).

What is the average humidity in December in Columbia Falls?

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

How many days does it rain in December in Columbia Falls?

In Columbia Falls, Montana, during December, the rain falls for 8.9 days and regularly aggregates up to 1.02" (26mm) of precipitation.

How much does it snow in Columbia Falls in December?

In Columbia Falls, in December, snow falls for 19.1 days, with typically accumulated 6.77" (172mm) of snow.

What is the month with the shortest days in Columbia Falls?

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

How many hours of daylight does Columbia Falls have in December?

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

How many hours of sunshine does Columbia Falls have in December?

In December, the average sunshine is 4h.

What is the month with the lowest UV index in Columbia Falls?

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

What is the UV index reading in December in Columbia Falls?

The average daily maximum UV index in December in Columbia Falls is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Columbia Falls, MT
  • Average high temperature in December: -3.5°C

The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is December (-3.5°C).

  • Average low temperature in December: -10.1°C

The month with the highest average low temperature is August (7.5°C).
The coldest month (with the lowest average low temperature) is February (-10.3°C).

Average pressure in December - Columbia Falls, MT
  • Average pressure in December: 1021.1mbar

The month with the highest atmospheric pressure is January (1021.4mbar).
The month with the lowest atmospheric pressure is June (1012.7mbar).

Average wind speed in December - Columbia Falls, MT
  • Average wind speed in December: 5.9km/h

The windiest month (with the highest average wind speed) is April (7.4km/h).
The calmest month (with the lowest average wind speed) is December (5.9km/h).

Average humidity in December - Columbia Falls, MT
  • Average humidity in December: 91%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).

Average rainfall in December - Columbia Falls, MT
  • Average rainfall in December: 26mm

The wettest month (with the highest rainfall) is June (36mm).
The driest month (with the least rainfall) is August (11mm).

Average rainfall days in December - Columbia Falls, MT
  • Average rainfall days in December: 8.9 days

The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is August (6.3 days).

Average snowfall in December - Columbia Falls, MT
  • Average snowfall in December: 172mm

The month with the highest snowfall is January (196mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in December - Columbia Falls, MT
  • Average snowfall days in December: 19.1 days

The month with the highest number of snowfall days is December (19.1 days).
Months with the least snowfall days are July and August (0 days).

Average daylight in December / Average sunshine in December - Columbia Falls, MT
  • 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: 11.9h).
The month with the least sunshine is January (Average sunshine: 3.5h).

Average sunshine days in December - Columbia Falls, MT
  • Average sunshine days in December: 11.8 days

The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is March (7.7 days).

Average UV index in December - Columbia Falls, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in December - Columbia Falls, MT
  • Average cloud cover in December: 61

The month with the most cloud cover is January (Cloud cover 65).
Months with the least cloud cover are July and August (Cloud cover 15).

Average visibility in December - Columbia Falls, MT
  • Average visibility in December: 6km

Months with the highest visibility are July and August (10km).
The month with the lowest visibility is January (5km).