December weather forecast
Oilmont, MT

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Weather in December

December, the first month of the winter in Oilmont, is also a subzero cold month, with an average temperature varying between 27.7°F (-2.4°C) and 15.4°F (-9.2°C).

Temperature

Oilmont experiences its lowest average temperatures in December, reaching a peak of 27.7°F (-2.4°C) and a minimum of 15.4°F (-9.2°C).

Humidity

The average relative humidity in December is 77%.

Rainfall

The months with the least rainfall are January and December Rain falls for 3.3 days and accumulates 0.39" (10mm) of rain.

Snowfall

Months with snowfall are January through May, September through December. In Oilmont, in December, during 9.5 snowfall days, 2.28" (58mm) of snow is typically accumulated. In Oilmont, during the entire year, snow falls for 53.7 days and aggregates up to 20.47" (520mm) of snow.

Daylight

With an average of 8h and 18min of daylight, December has the shortest days of the year.
On the first day of December in Oilmont, sunrise is at 7:59 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 8:20 am and sunset at 4:41 pm MST.

Sunshine

In Oilmont, the average sunshine in December is 5.5h.

UV index

The months with the lowest UV index 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 low health risk from unsafe exposure to UV radiation for average individuals.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Boost your sun resistance with garments that are densely woven yet spacious. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

December, marked by an average high-temperature of 27.7°F (-2.4°C) and a low-temperature of 15.4°F (-9.2°C), is the coldest month.

How cold is it in December?

Oilmont in December has an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 15.4°F (-9.2°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in July is evaluated at 80.6°F (27°C).

What is the average humidity in December?

The average relative humidity in December in Oilmont is 77%.

What is the driest month?

The months with the least rainfall are January and December Rain falls for 3.3 days and accumulates 0.39" (10mm) of rain.

How many days does it rain in December?

In Oilmont, in December, it is raining for 3.3 days, with typically 0.39" (10mm) of accumulated precipitation.

How many days does it snow in December?

In Oilmont, in December, snow falls for 9.5 days, with typically accumulated 2.28" (58mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 18min of daylight.

How many hours of daylight does Oilmont have in December?

The average day length in December is 8h and 21min.

When is the sunrise / sunset in December in Oilmont?

In December, on the first day of the month, sunrise is at 7:59 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 8:20 am and sunset at 4:41 pm MST.

How many hours of sunshine does Oilmont have in December?

The average sunshine duration in December is 5.5h.

What are the months with the lowest UV index?

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

What is the UV index intensity in December?

In Oilmont, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents 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
Oilmont, MT

Average temperature in December - Oilmont, MT
  • Average high temperature in December: 27.7°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (27.7°F).

  • Average low temperature in December: 15.4°F

The month with the highest average low temperature is August (58.3°F).
The coldest month (with the lowest average low temperature) is December (15.4°F).

Average pressure in December
Oilmont, MT

Average pressure in December - Oilmont, MT
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in December
Oilmont, MT

Average wind speed in December - Oilmont, MT
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

Average humidity in December
Oilmont, MT

Average humidity in December - Oilmont, MT
  • Average humidity in December: 77%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (40%).

Average rainfall in December
Oilmont, MT

Average rainfall in December - Oilmont, MT
  • Average rainfall in December: 0.39"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.39").

Average rainfall days in December
Oilmont, MT

Average rainfall days in December - Oilmont, MT
  • Average rainfall days in December: 3.3 days

The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is February (3.1 days).

Average snowfall in December
Oilmont, MT

Average snowfall in December - Oilmont, MT
  • Average snowfall in December: 2.28"

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

Average snowfall days in December
Oilmont, MT

Average snowfall days in December - Oilmont, MT
  • Average snowfall days in December: 9.5 days

The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Oilmont, MT
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in December
Oilmont, MT

Average sunshine days in December - Oilmont, MT
  • Average sunshine days in December: 20.8 days

The month with the most sunshine days is September (22.2 days).
The month with the least sunshine days is April (14.7 days).

Average UV index in December
Oilmont, MT

Average UV index in December - Oilmont, 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).

Average cloud cover in December
Oilmont, MT

Average cloud cover in December - Oilmont, MT
  • Average cloud cover in December: 42

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).

Average visibility in December
Oilmont, MT

Average visibility in December - Oilmont, 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).

Oilmont, Montana, USA

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