December weather forecast
McAllister, MT

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Weather in December

December, the first month of the winter in McAllister, is still a freezing cold month, with an average temperature ranging between min 7.7°F (-13.5°C) and max 22.3°F (-5.4°C).

Temperature

McAllister's coldest weather arrives in December, when temperatures average a high of 22.3°F (-5.4°C) and a low of 7.7°F (-13.5°C).

Humidity

The average relative humidity in December in McAllister is 89%.

Rainfall

December is the month with the least rainfall in McAllister. Rain falls for 4.7 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

Months with snowfall are January through December. In McAllister, during December, snow falls for 15.5 days and regularly aggregates up to 6.3" (160mm) of snow. Throughout the year, in McAllister, there are 136.1 snowfall days, and 86.93" (2208mm) of snow is accumulated.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year in McAllister.
On the first day of the month, sunrise is at 7:47 am and sunset at 4:45 pm. On the last day of December, sunrise is at 8:06 am and sunset at 4:53 pm MST.

Sunshine

In December, the average sunshine in McAllister, Montana, is 4.9h.

UV index

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in McAllister?

December tends to be the coldest month, with temperatures averaging a daily high of 22.3°F (-5.4°C) and a low of 7.7°F (-13.5°C).

How cold is December in McAllister?

McAllister in December has an average high-temperature of 22.3°F (-5.4°C) and an average low-temperature of 7.7°F (-13.5°C).

What is the average humidity in December in McAllister?

The average relative humidity in December in McAllister is 89%.

What is the driest month in McAllister?

The month with the least rainfall in McAllister, Montana, is December, when the rain falls for 4.7 days and typically collects 0.75" (19mm) of precipitation.

How much does it rain in McAllister in December?

In McAllister, Montana, during December, the rain falls for 4.7 days and regularly aggregates up to 0.75" (19mm) of precipitation.

How many days does it snow in December in McAllister?

In McAllister, during December, snow falls for 15.5 days and regularly aggregates up to 6.3" (160mm) of snow.

What is the month with the shortest days in McAllister?

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

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

In McAllister, the average day length in December is 8h and 47min.

When is the sunrise / sunset in December in McAllister?

In December, on the first day of the month, sunrise is at 7:47 am and sunset at 4:45 pm. On the last day of the month, in McAllister, Montana, sunrise is at 8:06 am and sunset at 4:53 pm MST.

How long on average sun shines in December in McAllister?

In December, the average sunshine duration is 4.9h.

What is the UV index intensity in December in McAllister?

In McAllister, Montana, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
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
McAllister, MT

Average temperature in December - McAllister, MT
  • Average high temperature in December: 22.3°F

The warmest month (with the highest average high temperature) is July (74.5°F).
The month with the lowest average high temperature is December (22.3°F).

  • Average low temperature in December: 7.7°F

The month with the highest average low temperature is August (46°F).
The coldest month (with the lowest average low temperature) is December (7.7°F).

Average pressure in December
McAllister, MT

Average pressure in December - McAllister, MT
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
McAllister, MT

Average wind speed in December - McAllister, MT
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
McAllister, MT

Average humidity in December - McAllister, MT
  • Average humidity in December: 89%

The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (50%).

Average rainfall in December
McAllister, MT

Average rainfall in December - McAllister, MT
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is December (0.75").

Average rainfall days in December
McAllister, MT

Average rainfall days in December - McAllister, MT
  • Average rainfall days in December: 4.7 days

The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is November (2.9 days).

Average snowfall in December
McAllister, MT

Average snowfall in December - McAllister, MT
  • Average snowfall in December: 6.3"

The month with the highest snowfall is April (14.76").
The month with the least snowfall is August (0.08").

Average snowfall days in December
McAllister, MT

Average snowfall days in December - McAllister, MT
  • Average snowfall days in December: 15.5 days

The month with the highest number of snowfall days is April (19.9 days).
The month with the least snowfall days is August (0.3 days).

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

Average daylight in December / Average sunshine in December - McAllister, 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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
McAllister, MT

Average sunshine days in December - McAllister, MT
  • Average sunshine days in December: 16 days

The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is April (6.9 days).

Average UV index in December
McAllister, MT

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

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).

Average cloud cover in December
McAllister, MT

Average cloud cover in December - McAllister, MT
  • Average cloud cover in December: 55

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in December
McAllister, MT

Average visibility in December - McAllister, MT
  • Average visibility in December: 4mi

The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

McAllister, Montana, USA

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