December weather forecast
Muddy, MT

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Weather in December

December, the first month of the winter in Muddy, is still a freezing cold month, with temperature in the range of an average low of 16.7°F (-8.5°C) and an average high of 30.4°F (-0.9°C).

Temperature

The month of December, characterized by an average high of 30.4°F (-0.9°C) and a low of 16.7°F (-8.5°C), is recognized as the coldest.

Humidity

In December, the average relative humidity is 77%.

Rainfall

December is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Muddy, Montana. In Muddy, in December, during 9.3 snowfall days, 3.15" (80mm) of snow is typically accumulated. Throughout the year, there are 55.2 snowfall days, and 23.5" (597mm) of snow is accumulated.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:27 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:33 pm MST.

Sunshine

The average sunshine in December is 5.4h.

UV index

January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

In Muddy, December records the average lowest temperatures, peaking at 30.4°F (-0.9°C) and reaching a low of 16.7°F (-8.5°C).

How cold is it in December?

The high-temperature, in December, in Muddy, records 30.4°F (-0.9°C), while the low-temperature is 16.7°F (-8.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is calculated to be 82.4°F (28°C).

What is the average humidity in December?

In Muddy, the average relative humidity in December is 77%.

What is the driest month?

December is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in December?

In December, the rain falls for 3.4 days. Throughout December, 0.47" (12mm) of precipitation is accumulated.

How much does it snow in December?

In Muddy, in December, snow falls for 9.3 days, with typically accumulated 3.15" (80mm) 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.

How many hours of daylight does Muddy have in December?

In December, the average day length is 8h and 46min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:27 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:33 pm MST.

How long on average sun shines in December?

In Muddy, the average sunshine duration in December is 5.4h.

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

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

What is the UV index reading in December?

In Muddy, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from 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
Muddy, MT

Average temperature in December - Muddy, MT
  • Average high temperature in December: 30.4°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in December: 16.7°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).

Average pressure in December
Muddy, MT

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

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

Average wind speed in December
Muddy, MT

Average wind speed in December - Muddy, MT
  • Average wind speed in December: 8.2mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

Average humidity in December
Muddy, MT

Average humidity in December - Muddy, 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 (42%).

Average rainfall in December
Muddy, MT

Average rainfall in December - Muddy, MT
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").

Average rainfall days in December
Muddy, MT

Average rainfall days in December - Muddy, MT
  • Average rainfall days in December: 3.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).

Average snowfall in December
Muddy, MT

Average snowfall in December - Muddy, MT
  • Average snowfall in December: 3.15"

The month with the highest snowfall is February (4.33").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Muddy, MT

Average snowfall days in December - Muddy, MT
  • Average snowfall days in December: 9.3 days

The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Muddy, 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 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 0min).

Average sunshine days in December
Muddy, MT

Average sunshine days in December - Muddy, MT
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).

Average UV index in December
Muddy, MT

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

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

Average cloud cover in December
Muddy, MT

Average cloud cover in December - Muddy, MT
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in December
Muddy, MT

Average visibility in December - Muddy, 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).

Muddy, Montana, USA

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