December weather forecast
Cameron, MT

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Weather in December

The first month of the winter, December, is also a subzero cold month in Cameron, Montana, with an average temperature varying between 22.3°F (-5.4°C) and 7.7°F (-13.5°C).

Temperature

Cameron reaches its lowest average temperatures in December, measuring 22.3°F (-5.4°C) at the peak and 7.7°F (-13.5°C) at the lowest.

Humidity

The average relative humidity in December is 89%.

Rainfall

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

Snowfall

Months with snowfall are January through December. In December, it is snowing for 15.5 days. Throughout December, 6.3" (160mm) of snow is accumulated. Throughout the year, there are 136.1 snowfall days, and 86.93" (2208mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:46 am and sunset at 4:45 pm. On the last day of December, sunrise is at 8:05 am and sunset at 4:54 pm MST.

Sunshine

In Cameron, the average sunshine in December is 4.9h.

UV index

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 2 during December translates into these guidelines:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.

Frequently asked questions

What is the coldest time of year?

December is the coldest month, with an average high-temperature of 22.3°F (-5.4°C) and an average low-temperature of 7.7°F (-13.5°C).

How cold is December?

In Cameron, 22.3°F (-5.4°C) is the average high-temperature and 7.7°F (-13.5°C) is the average low-temperature during December.

What is the average humidity in December?

In Cameron, the average relative humidity in December is 89%.

What is the driest month?

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

How much does it rain in December?

In Cameron, in December, during 4.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How much does it snow in Cameron in December?

In Cameron, in December, snow falls for 15.5 days, with typically accumulated 6.3" (160mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

What is the average length of the day in December?

In December, the average day length is 8h and 49min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:46 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 4:54 pm MST.

How many hours of sunshine does Cameron have in December?

In December, the average sunshine duration is 4.9h.

What is the UV index intensity in December?

In Cameron, 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
Cameron, MT

Average temperature in December - Cameron, 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
Cameron, MT

Average pressure in December - Cameron, 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
Cameron, MT

Average wind speed in December - Cameron, 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
Cameron, MT

Average humidity in December - Cameron, 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
Cameron, MT

Average rainfall in December - Cameron, 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
Cameron, MT

Average rainfall days in December - Cameron, 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
Cameron, MT

Average snowfall in December - Cameron, 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
Cameron, MT

Average snowfall days in December - Cameron, 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
Cameron, MT

Average daylight in December / Average sunshine in December - Cameron, 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
Cameron, MT

Average sunshine days in December - Cameron, 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
Cameron, MT

Average UV index in December - Cameron, 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
Cameron, MT

Average cloud cover in December - Cameron, 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
Cameron, MT

Average visibility in December - Cameron, 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).

Cameron, Montana, USA

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