December weather forecast
Rosebud, MT

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Weather in December

The first month of the winter, December, is also a subzero cold month in Rosebud, Montana, with an average temperature fluctuating between 17.6°F (-8°C) and 30.2°F (-1°C).

Temperature

With the beginning of December, the average high-temperature shows a decrease, transitioning from a frosty 43°F (6.1°C) in November to a freezing cold 30.2°F (-1°C). Throughout December, the temperature tends to fall to a consistent average low of 17.6°F (-8°C).

Humidity

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

Rainfall

In Rosebud, in December, during 6.5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 121.7 rainfall days, and 13.23" (336mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Rosebud, Montana, in December, during 11.6 snowfall days, 3.94" (100mm) of snow is typically accumulated. In Rosebud, during the entire year, snow falls for 56.6 days and aggregates up to 21.06" (535mm) of snow.

Daylight

December has the shortest days of the year in Rosebud, with an average of 8h and 42min of daylight.
On the first day of December, sunrise is at 7:28 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:29 pm MST.

Sunshine

In December, the average sunshine is 5.4h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 1 during December leads to these instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is December?

In Rosebud, 30.2°F (-1°C) is the average high-temperature and 17.6°F (-8°C) is the average low-temperature during December. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in July is appraised at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How much does it rain in Rosebud in December?

In Rosebud, in December, during 6.5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How much does it snow in December?

In Rosebud, in December, during 11.6 snowfall days, 3.94" (100mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 42min of daylight.

How many hours of daylight does Rosebud have in December?

The average day length in December is 8h and 41min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:28 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:29 pm MST.

How many hours of sunshine does Rosebud have in December?

The average sunshine duration in December is 5.4h.

When is the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to 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
Rosebud, MT

Average temperature in December - Rosebud, MT
  • Average high temperature in December: 30.2°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 17.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure in December
Rosebud, MT

Average pressure in December - Rosebud, MT
  • Average pressure in December: 30.12"Hg

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Rosebud, MT

Average wind speed in December - Rosebud, MT
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).

Average humidity in December
Rosebud, MT

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

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (38%).

Average rainfall in December
Rosebud, MT

Average rainfall in December - Rosebud, MT
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is November (0.63").

Average rainfall days in December
Rosebud, MT

Average rainfall days in December - Rosebud, MT
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (15.1 days).
The months with the least rainy days are January, February and December (6.5 days).

Average snowfall in December
Rosebud, MT

Average snowfall in December - Rosebud, MT
  • Average snowfall in December: 3.94"

The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Rosebud, MT

Average snowfall days in December - Rosebud, MT
  • Average snowfall days in December: 11.6 days

The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

Average sunshine days in December
Rosebud, MT

Average sunshine days in December - Rosebud, MT
  • Average sunshine days in December: 15.7 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.9 days).

Average UV index in December
Rosebud, MT

Average UV index in December - Rosebud, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Rosebud, MT

Average cloud cover in December - Rosebud, MT
  • Average cloud cover in December: 44

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

Average visibility in December
Rosebud, MT

Average visibility in December - Rosebud, 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).

Rosebud, Montana, USA

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