December weather forecast
Missoula, MT

The scenic area surrounding the iconic Higgins Street Bridge in Missoula, Montana
The scenic area surrounding the iconic Higgins Street Bridge in Missoula, Montana

Weather in December

December, the first month of the winter in Missoula, is still a freezing cold month, with an average temperature ranging between max 28°F (-2.2°C) and min 15.4°F (-9.2°C).

Temperature

The coldest month is December, with an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 15.4°F (-9.2°C).

Humidity

In Missoula, the average relative humidity in December is 88%.

Rainfall

The months with the least rainfall in Missoula are July and December Rain falls for 6.9 days and accumulates 0.16" (4mm) of rain.

Snowfall

Months with snowfall in Missoula are January through May, September through December. In Missoula, snow falls for 9 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, in Missoula, Montana, there are 44 snowfall days, and 8.07" (205mm) of snow is accumulated.

Daylight

The month with the shortest days in Missoula is December, with an average of 8h and 36min of daylight.
On the first day of the month, sunrise is at 8:00 am and sunset at 4:49 pm. On the last day of December, sunrise is at 8:21 am and sunset at 4:57 pm MST.

Sunshine

In Missoula, the average sunshine in December is 5h.

UV index

February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Missoula?

With an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 15.4°F (-9.2°C), December is the coldest month.

What is the average humidity in December in Missoula?

In Missoula, the average relative humidity in December is 88%.

What is the driest month in Missoula?

The months with the least rainfall in Missoula, Montana, are July and December Rain falls for 6.9 days and accumulates 0.16" (4mm) of rain.

How many days does it rain in December in Missoula?

In Missoula, Montana, in December, it is raining for 6.9 days, with typically 0.16" (4mm) of accumulated precipitation.

How many days does it snow in December in Missoula?

In December, in Missoula, Montana, it is snowing for 9 days. Throughout December, 1.02" (26mm) of snow is accumulated.

What is the month with the shortest days in Missoula?

The month with the shortest days in Missoula, Montana, is December, with an average of 8h and 36min of daylight.

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

The average day length in December in Missoula is 8h and 36min.

What time are sunrise and sunset in December in Missoula?

In December, on the first day of the month, sunrise is at 8:00 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:21 am and sunset at 4:57 pm MST.

How long on average sun shines in December in Missoula?

In Missoula, the average sunshine duration in December is 5h.

When is the lowest UV index in Missoula?

The months with the lowest UV index in Missoula are February and December, with an average maximum UV index of 1.

How high is the UV index in December in Missoula?

In Missoula, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health risk 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
Missoula, MT

Average temperature in December - Missoula, MT
  • Average high temperature in December: 28°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (28°F).

  • Average low temperature in December: 15.4°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (15.4°F).

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Average pressure in December
Missoula, MT

Average pressure in December - Missoula, MT
  • Average pressure in December: 30.18"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Missoula, MT

Average wind speed in December - Missoula, MT
  • Average wind speed in December: 4.3mph

The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Missoula, MT

Average humidity in December - Missoula, MT
  • Average humidity in December: 88%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is July (50%).

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Average rainfall in December
Missoula, MT

Average rainfall in December - Missoula, MT
  • Average rainfall in December: 0.16"

The wettest month (with the highest rainfall) is April (0.47").
The driest months (with the least rainfall) are July and December (0.16").

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Average rainfall days in December
Missoula, MT

Average rainfall days in December - Missoula, MT
  • Average rainfall days in December: 6.9 days

The month with the highest number of rainy days is April (8.8 days).
The month with the least rainy days is August (3.3 days).

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Average snowfall in December
Missoula, MT

Average snowfall in December - Missoula, MT
  • Average snowfall in December: 1.02"

The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Missoula, MT

Average snowfall days in December - Missoula, MT
  • Average snowfall days in December: 9 days

The month with the highest number of snowfall days is December (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
Missoula, MT

Average daylight in December / Average sunshine in December - Missoula, MT
  • Average daylight in December: 8h and 36min

The month with the longest days is June (Average daylight: 15h and 49min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).

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Average sunshine days in December
Missoula, MT

Average sunshine days in December - Missoula, MT
  • Average sunshine days in December: 22.1 days

The month with the most sunshine days is July (27 days).
The month with the least sunshine days is April (17.8 days).

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Average UV index in December
Missoula, MT

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

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in December
Missoula, MT

Average cloud cover in December - Missoula, MT
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 14).

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Average visibility in December
Missoula, MT

Average visibility in December - Missoula, MT
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

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