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United States weather

Weather in Great Falls, Montana for December 2026

Your guide to Great Falls weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 4 snowy days, Great Falls usually enjoys a light touch of snow in December.

    • Temperatures

  • In general, the average temperature in Great Falls at the beginning of December is 1 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 3.3 °F by the end of December.

    • More

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

Average dry days
27
Dry days
Average rainy days
0
Rainy days
Average snowy days
4
Snow days
Average temperatures
3°/-4°
Temperatures
Average wind speed
27 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Great Falls Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
0°
2
Moderate or heavy snow showers
0°
3
Freezing fog
0°
4
Overcast
1°
5
Overcast
1°
6
Mist
3°
7
Overcast
2°
8
Overcast
4°
9
Overcast
6°
10
Mist
7°
11
Overcast
7°
12
Moderate snow
-3°
13
Mist
-2°
14
Overcast
6°
15
Overcast
6°
16
Sunny
7°
17
Cloudy
5°
18
Overcast
2°
19
Cloudy
6°
20
Sunny
3°
21
Partly cloudy
3°
22
Moderate snow
6°
23
Freezing fog
2°
24
Mist
0°
25
Overcast
6°
26
Overcast
4°
27
Overcast
0°
28
Sunny
-3°
29
Overcast
3°
30
Partly cloudy
6°
31
Partly cloudy
7°

Temperatures trend during December in Great Falls

See the weather trend as well as the moving average line

December weather in Great Falls day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 0° /-11° 0 mm 0 cm
Dec. 2 Moderate or heavy snow showers
Moderate or heavy snow showers
 0° /-2° 14 mm 10.1 cm
Dec. 3 Freezing fog
Freezing fog
 0° /-8° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 1° /-4° 0 mm 0 cm
Dec. 5 Overcast
Overcast
 1° /-4° 1.9 mm 1.4 cm
Dec. 6 Mist
Mist
 3° /-1° 0 mm 0 cm
Dec. 7 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Dec. 8 Overcast
Overcast
 4° /1° 0 mm 0 cm
Dec. 9 Overcast
Overcast
 6° /-2° 0 mm 0 cm
Dec. 10 Mist
Mist
 7° /-1° 0 mm 0 cm
Dec. 11 Overcast
Overcast
 7° /-6° 0 mm 0 cm
Dec. 12 Moderate snow
Moderate snow
 -3° /-10° 10.3 mm 7.4 cm
Dec. 13 Mist
Mist
 -2° /-11° 0 mm 0 cm
Dec. 14 Overcast
Overcast
 6° /-1° 0 mm 0 cm
Dec. 15 Overcast
Overcast
 6° /0° 0 mm 0 cm
Dec. 16 Sunny
Sunny
 7° /0° 0 mm 0 cm
Dec. 17 Cloudy
Cloudy
 5° /-1° 0 mm 0 cm
Dec. 18 Overcast
Overcast
 2° /-4° 0 mm 0 cm
Dec. 19 Cloudy
Cloudy
 6° /-2° 0 mm 0 cm
Dec. 20 Sunny
Sunny
 3° /-2° 0 mm 0 cm
Dec. 21 Partly cloudy
Partly cloudy
 3° /-4° 0 mm 0 cm
Dec. 22 Moderate snow
Moderate snow
 6° /-1° 4 mm 1.7 cm
Dec. 23 Freezing fog
Freezing fog
 2° /-3° 0 mm 0 cm
Dec. 24 Mist
Mist
 0° /-2° 0 mm 0 cm
Dec. 25 Overcast
Overcast
 6° /-3° 0 mm 0 cm
Dec. 26 Overcast
Overcast
 4° /0° 0 mm 0 cm
Dec. 27 Overcast
Overcast
 0° /-13° 0 mm 0 cm
Dec. 28 Sunny
Sunny
 -3° /-15° 0 mm 0 cm
Dec. 29 Overcast
Overcast
 3° /-6° 0 mm 0 cm
Dec. 30 Partly cloudy
Partly cloudy
 6° /-4° 0 mm 0 cm
Dec. 31 Partly cloudy
Partly cloudy
 7° /-2° 0 mm 0 cm
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Important Notice
Our weather forecast for Great Falls 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 Great Falls forecast closer to your planned date for the most up-to-date weather information.
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Great Falls in December - FAQ

What are the expected maximum and minimum temperatures in Great Falls during December?

Brace for cold days with temperatures not exceeding 3° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Great Falls during December?

In December, Great Falls can expect light to moderate rainfall, totaling 30.2 mm across approximately 0 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Great Falls in December 2026?

Great Falls experiences an average snowfall of 20.6 cm during December, occurring over 4 days.

What are the typical wind conditions in Great Falls during December?

The average wind speed in Great Falls during December is 27 km/h, suggesting breezy to windy conditions, depending on your activities.

Great Falls snow forecast December 2026

Track daily snowfall levels and discover Great Falls’s snowy potential this December ❄️
On average, Great Falls sees 4 snowy days during December, with approximately 20.6 cm of total snowfall.

December rainfall patterns in Great Falls

Explore the daily rainfall trends and prepare for Great Fallss December weather 💧

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Location coordinates Where is Great Falls?

Get accurate weather forecasts for Great Falls, located at latitude 47.5 and longitude -111.301. Stay updated with localized weather information tailored for Great Falls.

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