December weather forecast
Garneill, MT

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Weather in December

The first month of the winter, December, is still a freezing cold month in Garneill, Montana, with an average temperature ranging between max 29.3°F (-1.5°C) and min 16.7°F (-8.5°C).

Temperature

In Garneill, Montana, December records the lowest average temperatures, peaking at 29.3°F (-1.5°C) and reaching a low of 16.7°F (-8.5°C).

Humidity

In Garneill, Montana, the average relative humidity in December is 76%.

Rainfall

The month with the least rainfall is December, when the rain falls for 7.2 days and typically collects 0.47" (12mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Garneill, in December, snow falls for 11.4 days, with typically accumulated 3.62" (92mm) of snow. In Garneill, during the entire year, snow falls for 72.8 days and aggregates up to 33.5" (851mm) of snow.

Daylight

The month with the shortest days in Garneill is December, with an average of 8h and 36min of daylight.
On the first day of December, sunrise is at 7:43 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 4:41 pm MST.

Sunshine

In December, the average sunshine in Garneill is 6.5h.

UV index

The months with the lowest UV index 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 low health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. 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 is the coldest month in Garneill?

December is the month when Garneill experiences its coldest temperatures, averaging a high of 29.3°F (-1.5°C) and a low of 16.7°F (-8.5°C).

How cold is it in Garneill in December?

December temperatures in Garneill, Montana, vary between a high-temperature of 29.3°F (-1.5°C) and a low-temperature of 16.7°F (-8.5°C).

What is the average humidity in December in Garneill?

The average relative humidity in December in Garneill, Montana, is 76%.

What is the driest month in Garneill?

December is the month with the least rainfall in Garneill, Montana. Rain falls for 7.2 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in December in Garneill?

In December, in Garneill, the rain falls for 7.2 days. Throughout December, 0.47" (12mm) of precipitation is accumulated.

How much does it snow in Garneill in December?

In December, in Garneill, Montana, it is snowing for 11.4 days. Throughout December, 3.62" (92mm) of snow is accumulated.

What is the month with the shortest days in Garneill?

December has the shortest days of the year in Garneill, Montana, with an average of 8h and 36min of daylight.

How many hours of daylight does Garneill have in December?

In December, the average day length is 8h and 37min.

What time are sunrise and sunset in December in Garneill?

On the first day of December, sunrise is at 7:43 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 4:41 pm MST.

How many hours of sunshine does Garneill have in December?

The average sunshine duration in December in Garneill is 6.5h.

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

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

What is the UV index intensity in December in Garneill?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Garneill, MT

Average temperature in December - Garneill, MT
  • Average high temperature in December: 29.3°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is December (29.3°F).

  • Average low temperature in December: 16.7°F

The months with the highest average low temperature are July and August (54.3°F).
The coldest month (with the lowest average low temperature) is February (16.3°F).

Average pressure in December
Garneill, MT

Average pressure in December - Garneill, MT
  • Average pressure in December: 30.14"Hg

The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in December
Garneill, MT

Average wind speed in December - Garneill, MT
  • Average wind speed in December: 10.3mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in December
Garneill, MT

Average humidity in December - Garneill, MT
  • Average humidity in December: 76%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (45%).

Average rainfall in December
Garneill, MT

Average rainfall in December - Garneill, MT
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is December (0.47").

Average rainfall days in December
Garneill, MT

Average rainfall days in December - Garneill, MT
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and December (7.2 days).

Average snowfall in December
Garneill, MT

Average snowfall in December - Garneill, MT
  • Average snowfall in December: 3.62"

The month with the highest snowfall is April (6.61").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Garneill, MT

Average snowfall days in December - Garneill, MT
  • Average snowfall days in December: 11.4 days

The month with the highest number of snowfall days is February (14.2 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Garneill, MT
  • Average daylight in December: 8h and 4min

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

  • Average sunshine in December: 6h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).

Average sunshine days in December
Garneill, MT

Average sunshine days in December - Garneill, MT
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is September (19.2 days).
The month with the least sunshine days is April (9 days).

Average UV index in December
Garneill, MT

Average UV index in December - Garneill, 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).

Average cloud cover in December
Garneill, MT

Average cloud cover in December - Garneill, MT
  • Average cloud cover in December: 33

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in December
Garneill, MT

Average visibility in December - Garneill, 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).

Garneill, Montana, USA

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