December weather forecast
Fairfield, MT

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Weather in December

December, the first month of the winter in Fairfield, is still a freezing cold month, with an average temperature fluctuating between 16.2°F (-8.8°C) and 28.8°F (-1.8°C).

Temperature

The month of December sees the lowest average temperatures, reaching 28.8°F (-1.8°C) at the peak and 16.2°F (-8.8°C) at the low.

Humidity

In Fairfield, Montana, the average relative humidity in December is 75%.

Rainfall

December is the month with the least rainfall in Fairfield, Montana. Rain falls for 3.5 days and accumulates 0.35" (9mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Fairfield, Montana. In Fairfield, during December, snow falls for 8.3 days and regularly aggregates up to 2.4" (61mm) of snow. Throughout the year, in Fairfield, there are 50.3 snowfall days, and 21.26" (540mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Fairfield, with an average of 8h and 30min of daylight.
On the first day of December, sunrise is at 7:56 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 8:16 am and sunset at 4:46 pm MST.

Sunshine

With an average of 5.8h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index in Fairfield, Montana, are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 2 during December leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Frequently asked questions

What is the coldest month in Fairfield?

December is the coldest month in Fairfield, exhibiting average temperatures of 28.8°F (-1.8°C) at the peak and 16.2°F (-8.8°C) at the base.

How cold is it in Fairfield in December?

The high-temperature, in December, in Fairfield, is 28.8°F (-1.8°C), while the low-temperature averages to 16.2°F (-8.8°C).

What is the average humidity in December in Fairfield?

In December, the average relative humidity is 75%.

What is the driest month in Fairfield?

The month with the least rainfall in Fairfield is December, when the rain falls for 3.5 days and typically collects 0.35" (9mm) of precipitation.

How much does it rain in Fairfield in December?

In Fairfield, in December, during 3.5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

How much does it snow in Fairfield in December?

In Fairfield, in December, during 8.3 snowfall days, 2.4" (61mm) of snow is typically accumulated.

What is the month with the shortest days in Fairfield?

December has the shortest days of the year in Fairfield, with an average of 8h and 30min of daylight.

How many hours of daylight does Fairfield have in December?

The average day length in December in Fairfield is 8h and 31min.

What time are sunrise and sunset in December in Fairfield?

On the first day of December in Fairfield, Montana, sunrise is at 7:56 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 8:16 am and sunset at 4:46 pm MST.

What is the month with the least sunshine in Fairfield?

With an average of 5.8h of sunshine, December has the least sunshine of the year in Fairfield, Montana.

How many hours of sunshine does Fairfield have in December?

The average sunshine duration in December is 5.8h.

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

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Fairfield, Montana.

What is the UV index reading in December in Fairfield?

In Fairfield, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's 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
Fairfield, MT

Average temperature in December - Fairfield, MT
  • Average high temperature in December: 28.8°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.8°F).

  • Average low temperature in December: 16.2°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).

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Average pressure in December
Fairfield, MT

Average pressure in December - Fairfield, MT
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Fairfield, MT

Average wind speed in December - Fairfield, MT
  • Average wind speed in December: 10.7mph

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).

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Average humidity in December
Fairfield, MT

Average humidity in December - Fairfield, MT
  • Average humidity in December: 75%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in December
Fairfield, MT

Average rainfall in December - Fairfield, MT
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is December (0.35").

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Average rainfall days in December
Fairfield, MT

Average rainfall days in December - Fairfield, MT
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is November (2.7 days).

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Average snowfall in December
Fairfield, MT

Average snowfall in December - Fairfield, MT
  • Average snowfall in December: 2.4"

The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Fairfield, MT

Average snowfall days in December - Fairfield, MT
  • Average snowfall days in December: 8.3 days

The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Fairfield, MT

Average daylight in December / Average sunshine in December - Fairfield, MT
  • Average daylight in December: 8h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in December
Fairfield, MT

Average sunshine days in December - Fairfield, MT
  • Average sunshine days in December: 21.7 days

The month with the most sunshine days is October (23.2 days).
The month with the least sunshine days is February (15.8 days).

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Average UV index in December
Fairfield, MT

Average UV index in December - Fairfield, 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, October, November and December (UV index 2).

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Average cloud cover in December
Fairfield, MT

Average cloud cover in December - Fairfield, MT
  • Average cloud cover in December: 38

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 14).

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Average visibility in December
Fairfield, MT

Average visibility in December - Fairfield, 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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Fairfield, Montana, USA

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