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Weather in Glacier National Park, Montana for December 2026

Your guide to Glacier National Park weather in December - trends and predictions

    Snow Forecast ❄️

  • Expect heavy snowfall in Glacier National Park during December, with an average of 17 snowy days.

    • Temperatures

  • In general, the average temperature in Glacier National Park at the beginning of December is -0.4 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of -0.1 °C by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
11
Dry days
Average rainy days
3
Rainy days
Average snowy days
17
Snow days
Average temperatures
1°/-3°
Temperatures
Average wind speed
10 km/h
Avg max wind
Average humidity
90 %
Avg humidity

Glacier National Park Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
-2°
2
Overcast
-1°
3
Overcast
-1°
4
Overcast
0°
5
Overcast
-1°
6
Overcast
0°
7
Moderate rain at times
2°
8
Light freezing rain
3°
9
Light freezing rain
2°
10
Overcast
2°
11
Overcast
3°
12
Cloudy
1°
13
Overcast
2°
14
Light freezing rain
2°
15
Patchy moderate snow
3°
16
Light freezing rain
2°
17
Overcast
3°
18
Patchy moderate snow
2°
19
Overcast
2°
20
Overcast
1°
21
Patchy rain possible
1°
22
Overcast
2°
23
Patchy moderate snow
2°
24
Patchy rain possible
2°
25
Overcast
1°
26
Light freezing rain
1°
27
Light freezing rain
0°
28
Moderate or heavy rain shower
-2°
29
Patchy moderate snow
0°
30
Moderate snow
0°
31
Mist
-1°

Temperatures trend during December in Glacier National Park

See the weather trend as well as the moving average line

December weather in Glacier National Park day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 -2° /-10° 2 mm 0.8 cm
Dec. 2 Overcast
Overcast
 -1° /-6° 0 mm 0 cm
Dec. 3 Overcast
Overcast
 -1° /-6° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 0° /-5° 4.1 mm 1.7 cm
Dec. 5 Overcast
Overcast
 -1° /-5° 6.3 mm 4.6 cm
Dec. 6 Overcast
Overcast
 0° /-3° 0 mm 0 cm
Dec. 7 Moderate rain at times
Moderate rain at times
 2° /-2° 1.5 mm 0 cm
Dec. 8 Light freezing rain
Light freezing rain
 3° /-2° 9 mm 5.1 cm
Dec. 9 Light freezing rain
Light freezing rain
 2° /-2° 3.4 mm 0 cm
Dec. 10 Overcast
Overcast
 2° /-2° 16.5 mm 8.5 cm
Dec. 11 Overcast
Overcast
 3° /-3° 3.3 mm 0 cm
Dec. 12 Cloudy
Cloudy
 1° /-5° 0 mm 0 cm
Dec. 13 Overcast
Overcast
 2° /-2° 0 mm 0 cm
Dec. 14 Light freezing rain
Light freezing rain
 2° /-4° 0.2 mm 0 cm
Dec. 15 Patchy moderate snow
Patchy moderate snow
 3° /-2° 0.6 mm 0.3 cm
Dec. 16 Light freezing rain
Light freezing rain
 2° /-3° 0.6 mm 0 cm
Dec. 17 Overcast
Overcast
 3° /-2° 15.9 mm 3.2 cm
Dec. 18 Patchy moderate snow
Patchy moderate snow
 2° /-1° 9.2 mm 5.4 cm
Dec. 19 Overcast
Overcast
 2° /-3° 4.5 mm 2.1 cm
Dec. 20 Overcast
Overcast
 1° /-3° 0.1 mm 0 cm
Dec. 21 Patchy rain possible
Patchy rain possible
 1° /-4° 0.6 mm 0 cm
Dec. 22 Overcast
Overcast
 2° /-1° 0.3 mm 0 cm
Dec. 23 Patchy moderate snow
Patchy moderate snow
 2° /-2° 0.7 mm 0.3 cm
Dec. 24 Patchy rain possible
Patchy rain possible
 2° /-2° 6.5 mm 4.6 cm
Dec. 25 Overcast
Overcast
 1° /-1° 0.2 mm 0 cm
Dec. 26 Light freezing rain
Light freezing rain
 1° /-2° 15.6 mm 7.9 cm
Dec. 27 Light freezing rain
Light freezing rain
 0° /-5° 2.6 mm 1.6 cm
Dec. 28 Moderate or heavy rain shower
Moderate or heavy rain shower
 -2° /-7° 7.1 mm 0.2 cm
Dec. 29 Patchy moderate snow
Patchy moderate snow
 0° /-3° 5.2 mm 3.2 cm
Dec. 30 Moderate snow
Moderate snow
 0° /-6° 1.5 mm 0.8 cm
Dec. 31 Mist
Mist
 -1° /-7° 0.9 mm 0.7 cm
Next
Important Notice
Our weather forecast for Glacier National Park in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Glacier National Park forecast closer to your planned date for the most up-to-date weather information.
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Glacier National Park in December - FAQ

What are the expected maximum and minimum temperatures in Glacier National Park during December?

Brace for cold days with temperatures not exceeding 1° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Glacier National Park during December?

Significant rainfall exceeding 118.1 mm is expected in Glacier National Park during December, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Glacier National Park in December 2026?

Glacier National Park experiences an average snowfall of 50.875 cm during December, occurring over 17 days.

What are the typical wind conditions in Glacier National Park during December?

The average wind speed in Glacier National Park during December is 10 km/h, suggesting breezy to windy conditions, depending on your activities.

Glacier National Park snow forecast December 2026

Track daily snowfall levels and discover Glacier National Park’s snowy potential this December ❄️
On average, Glacier National Park sees 17 snowy days during December, with approximately 50.9 cm of total snowfall.

December rainfall patterns in Glacier National Park

Explore the daily rainfall trends and prepare for Glacier National Parks December weather 💧
Typically, Glacier National Park has 3 rainy days in December with a total of 118.1 mm of rainfall.

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Location coordinates Where is Glacier National Park?

Get accurate weather forecasts for Glacier National Park, located at latitude 48.683 and longitude -113.8. Stay updated with localized weather information tailored for Glacier National Park.

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