December weather forecast
Edgar, MT

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Weather in December

December, the first month of the winter in Edgar, is also a subzero cold month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 31.3°F (-0.4°C).

Temperature

The month of December sees the lowest average temperatures, reaching 31.3°F (-0.4°C) at the peak and 18.5°F (-7.5°C) at the low.

Humidity

In December, the average relative humidity in Edgar is 74%.

Rainfall

In December, in Edgar, the rain falls for 3.2 days. Throughout December, 0.31" (8mm) of precipitation is accumulated. Throughout the year, there are 95.8 rainfall days, and 8.74" (222mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Edgar are January through May, September through December. In December, in Edgar, it is snowing for 8.5 days. Throughout December, 2.36" (60mm) of snow is accumulated. In Edgar, Montana, during the entire year, snow falls for 44.1 days and aggregates up to 15.75" (400mm) of snow.

Daylight

December has the shortest days of the year in Edgar, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:35 am and sunset at 4:33 pm. On the last day of December, in Edgar, Montana, sunrise is at 7:55 am and sunset at 4:42 pm MST.

Sunshine

The average sunshine in December in Edgar is 5.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Edgar. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

What month is the coldest in Edgar?

December, with average temperatures reaching a high of 31.3°F (-0.4°C) and a low of 18.5°F (-7.5°C), is the coldest month in Edgar.

How cold is December in Edgar?

The high-temperature in Edgar, Montana, during December is 31.3°F (-0.4°C) and the low-temperature is 18.5°F (-7.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 82.4°F (28°C).

What is the average humidity in December in Edgar?

The average relative humidity in December in Edgar, Montana, is 74%.

How many days does it rain in December in Edgar?

In Edgar, Montana, in December, during 3.2 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

How much does it snow in Edgar in December?

In Edgar, in December, during 8.5 snowfall days, 2.36" (60mm) of snow is typically accumulated.

What is the month with the shortest days in Edgar?

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

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

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

When is the sunrise / sunset in December in Edgar?

On the first day of December in Edgar, sunrise is at 7:35 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:42 pm MST.

How long on average sun shines in December in Edgar?

The average sunshine duration in December in Edgar, Montana, is 5.8h.

What are the months with the lowest UV index in Edgar?

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

What is the UV index reading in December in Edgar?

The average daily maximum UV index in December in Edgar, Montana, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe 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
Edgar, MT

Average temperature in December - Edgar, MT
  • Average high temperature in December: 31.3°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (31.3°F).

  • Average low temperature in December: 18.5°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).

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Average pressure in December
Edgar, MT

Average pressure in December - Edgar, 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).

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Average wind speed in December
Edgar, MT

Average wind speed in December - Edgar, MT
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in December
Edgar, MT

Average humidity in December - Edgar, MT
  • Average humidity in December: 74%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).

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Average rainfall in December
Edgar, MT

Average rainfall in December - Edgar, MT
  • Average rainfall in December: 0.31"

The wettest month (with the highest rainfall) is May (1.54").
The driest month (with the least rainfall) is January (0.28").

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Average rainfall days in December
Edgar, MT

Average rainfall days in December - Edgar, MT
  • Average rainfall days in December: 3.2 days

The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (2.6 days).

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Average snowfall in December
Edgar, MT

Average snowfall in December - Edgar, MT
  • Average snowfall in December: 2.36"

The month with the highest snowfall is February (2.68").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Edgar, MT

Average snowfall days in December - Edgar, MT
  • Average snowfall days in December: 8.5 days

The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

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Average sunshine days in December
Edgar, MT

Average sunshine days in December - Edgar, MT
  • Average sunshine days in December: 22.5 days

The month with the most sunshine days is December (22.5 days).
The month with the least sunshine days is May (13.1 days).

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Average UV index in December
Edgar, MT

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Edgar, MT

Average cloud cover in December - Edgar, MT
  • Average cloud cover in December: 39

The month with the most cloud cover is February (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in December
Edgar, MT

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

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