December weather forecast and climate
Billings, MT

The forest of trees in the plains, on the sandstone bluffs in Billings, Montana
The forest of trees in the plains, on the sandstone bluffs in Billings, Montana
The first month of the winter, December, is also a subzero cold month in Billings, Montana, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 31.1°F (-0.5°C).

Temperature

December is the coldest month, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 18.9°F (-7.3°C).

Humidity

In Billings, the average relative humidity is 74%.

Rainfall

In Billings, Montana, in December, during 6.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, in Billings, there are 128.5 rainfall days, and 14.69" (373mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Billings. In Billings, during December, snow falls for 12.8 days and regularly aggregates up to 5.24" (133mm) of snow. In Billings, during the entire year, snow falls for 64.5 days, and aggregates up to 31.18" (792mm) of snow.

Daylight

December has the shortest days of the year in Billings, with an average of 8.7h of daylight.

Sunshine

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

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Billings. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Billings?

The coldest month is December, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 18.9°F (-7.3°C).

What is the temperature in December in Billings?

In December, in Billings, the average high-temperature is 31.1°F (-0.5°C), and the average low-temperature is 18.9°F (-7.3°C).

What is the average humidity in December in Billings?

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

How much does it rain in Billings in December?

In Billings, during December, the rain falls for 6.8 days and regularly aggregates up to 0.75" (19mm) of precipitation.

How many days does it snow in December in Billings?

In Billings, in December, snow falls for 12.8 days, with typically accumulated 5.24" (133mm) of snow.

What is the month with the shortest days in Billings?

With an average of 8.7h of daylight, December has the shortest days of the year in Billings, Montana.

How many hours of daylight does Billings have in December?

In Billings, Montana, the average length of the day in December is 8.7h.

How long on average sun shines in December in Billings?

The average sunshine in December in Billings is 5.5h.

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

Months with the lowest UV index in Billings, Montana, are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Billings?

In Billings, Montana, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.
Average temperature in December - Billings, MT
  • Average high temperature in December: -0.5°C

The warmest month (with the highest average high temperature) is July (29.6°C).
The month with the lowest average high temperature is December (-0.5°C).

  • Average low temperature in December: -7.3°C

The month with the highest average low temperature is July (15.8°C).
The coldest month (with the lowest average low temperature) is February (-7.6°C).

Average pressure in December - Billings, MT
  • Average pressure in December: 1020.3mbar

The month with the highest atmospheric pressure is January (1020.5mbar).
The month with the lowest atmospheric pressure is June (1011.3mbar).

Average wind speed in December - Billings, MT
  • Average wind speed in December: 15.2km/h

The windiest month (with the highest average wind speed) is January (15.9km/h).
The calmest month (with the lowest average wind speed) is July (11.5km/h).

Average humidity in December - Billings, 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%).

Average rainfall in December - Billings, MT
  • Average rainfall in December: 19mm

The wettest month (with the highest rainfall) is May (54mm).
The driest month (with the least rainfall) is July (18mm).

Average rainfall days in December - Billings, MT
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in December - Billings, MT
  • Average snowfall in December: 133mm

The month with the highest snowfall is February (165mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in December - Billings, MT
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is February (13.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in December / Average sunshine in December - Billings, MT
  • Average daylight in December: 8.7h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.2h).

Average sunshine days in December - Billings, MT
  • Average sunshine days in December: 14.9 days

The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (9.9 days).

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

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December - Billings, MT
  • Average cloud cover in December: 43

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 - Billings, MT
  • Average visibility in December: 9km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).