December weather forecast
Deer Lodge, MT

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Weather in December

In December, Deer Lodge is enveloped in the full embrace of winter, with average temperature plummeting to 25.5°F (-3.6°C). The shrinking daylight hours and a chilly wind sweeping across town amplify the wintry feel. Snowfall remains substantial throughout the month, peaking at 6.65in, and adding to the severe cold snap. The cloud cover percentage ascends to the second-highest for the year, while the lengthening number of snowfall days underscores the intensifying winter. Deer Lodge rounds out the year encapsulated in the crisp chill of December, completing another cycle of diverse weather patterns.

Temperature

December brings the lowest temperatures, with an average high of 25.5°F (-3.6°C) and an average low of 11.7°F (-11.3°C).

Humidity

In Deer Lodge, the average relative humidity in December is 87%.

Rainfall

In Deer Lodge, Montana, during December, the rain falls for 8.8 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Deer Lodge, Montana, during the entire year, the rain falls for 151.7 days and collects up to 16.46" (418mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Deer Lodge. In Deer Lodge, during December, snow falls for 17 days and regularly aggregates up to 6.65" (169mm) of snow. In Deer Lodge, during the entire year, snow falls for 105 days and aggregates up to 49.69" (1262mm) of snow.

Daylight

With an average of 8h and 42min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:54 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 4:54 pm MST.

Sunshine

The average sunshine in December in Deer Lodge is 5.6h.

UV index

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

What month is the coldest in Deer Lodge?

December stands out as Deer Lodge's coldest month, with an average high-temperature of 25.5°F (-3.6°C) and a low-temperature of 11.7°F (-11.3°C).

How cold is December in Deer Lodge?

In Deer Lodge, 25.5°F (-3.6°C) is the average high-temperature and 11.7°F (-11.3°C) is the average low-temperature during December.

What is the average humidity in December in Deer Lodge?

In Deer Lodge, Montana, the average relative humidity in December is 87%.

How many days does it rain in December in Deer Lodge?

In Deer Lodge, Montana, during December, the rain falls for 8.8 days and regularly aggregates up to 0.91" (23mm) of precipitation.

How many days does it snow in December in Deer Lodge?

In Deer Lodge, Montana, during December, snow falls for 17 days and regularly aggregates up to 6.65" (169mm) of snow.

What is the month with the shortest days in Deer Lodge?

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

How many hours of daylight does Deer Lodge have in December?

In Deer Lodge, Montana, the average day length in December is 8h and 40min.

What time are sunrise and sunset in December in Deer Lodge?

In December, on the first day of the month, sunrise is at 7:54 am and sunset at 4:45 pm. On the last day of the month, in Deer Lodge, Montana, sunrise is at 8:14 am and sunset at 4:54 pm MST.

How many hours of sunshine does Deer Lodge have in December?

The average sunshine duration in December in Deer Lodge, Montana, is 5.6h.

What is the UV index reading in December in Deer Lodge?

In December, the average daily maximum UV index in Deer Lodge is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
35.6°F 2°C
25.5°F -3.6°C
28.4°F -2°C
Average low temperature
19.2°F -7.1°C
11.7°F -11.3°C
13.6°F -10.2°C
Average pressure
30.12" 765mmHg
30.19" 767mmHg
30.19" 767mmHg
Average wind speed
6.5mph 10.5km/h
6.5mph 10.5km/h
6.6mph 10.6km/h
Average max. wind speed
7mph 11.3km/h
7mph 11.3km/h
7.1mph 11.4km/h
Average wind speed gusts
11.6mph 18.7km/h
11.7mph 18.8km/h
12.3mph 19.8km/h
Average humidity
80%
87%
88%
Average rainfall
0.91" 23mm
0.91" 23mm
0.87" 22mm
Average rainfall days
9.9
8.8
11.2
Average snowfall
5.79" 147mm
6.65" 169mm
6.18" 157mm
Average snowfall days
11.5
17
16.6
Average daylight
9h 2min
8h 4min
9h 1min
Average sunshine
6h 2min
5h 4min
5h 3min
Average sunshine days
14
13.5
12.8
Average UV index
2
2
2
Average cloud cover
36%
45%
46%
Average visibility
6mi 9.7km
4mi 6.4km
4mi 6.4km

Average temperature in December
Deer Lodge, MT

Average temperature in December - Deer Lodge, MT
  • Average high temperature in December: 25.5°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.5°F).

  • Average low temperature in December: 11.7°F

The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (11.7°F).

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Average pressure in December
Deer Lodge, MT

Average pressure in December - Deer Lodge, MT
  • Average pressure in December: 30.19"Hg

The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Deer Lodge, MT

Average wind speed in December - Deer Lodge, MT
  • Average wind speed in December: 6.5mph

The windiest months (with the highest average wind speed) are January and April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in December
Deer Lodge, MT

Average humidity in December - Deer Lodge, MT
  • Average humidity in December: 87%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are July and August (49%).

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Average rainfall in December
Deer Lodge, MT

Average rainfall in December - Deer Lodge, MT
  • Average rainfall in December: 0.91"

The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.87").

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Average rainfall days in December
Deer Lodge, MT

Average rainfall days in December - Deer Lodge, MT
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (19.9 days).
The month with the least rainy days is December (8.8 days).

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Average snowfall in December
Deer Lodge, MT

Average snowfall in December - Deer Lodge, MT
  • Average snowfall in December: 6.65"

The month with the highest snowfall is February (8.78").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Deer Lodge, MT

Average snowfall days in December - Deer Lodge, MT
  • Average snowfall days in December: 17 days

The month with the highest number of snowfall days is February (19.7 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Deer Lodge, MT

Average daylight in December / Average sunshine in December - Deer Lodge, 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 4min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).

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Average sunshine days in December
Deer Lodge, MT

Average sunshine days in December - Deer Lodge, MT
  • Average sunshine days in December: 13.5 days

The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is February (6.7 days).

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Average UV index in December
Deer Lodge, MT

Average UV index in December - Deer Lodge, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in December
Deer Lodge, MT

Average cloud cover in December - Deer Lodge, MT
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in December
Deer Lodge, MT

Average visibility in December - Deer Lodge, MT
  • Average visibility in December: 4mi

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

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Deer Lodge, Montana, USA

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