Flathead County (Glacier National Park)
December
Weather in Flathead County, Montana for December 2026
Your guide to Flathead County weather in December - trends and predictions
Expect heavy snowfall in Flathead County during December, with an average of 17 snowy days.
In general, the average temperature in Flathead County 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.
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Snow Forecast ❄️
Temperatures
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11
Dry days
3
Rainy days
17
Snow days
1°/-3°
Temperatures
10 km/h
Avg max wind
90 %
Avg humidity
Flathead County Weather December
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Temperatures trend during December in Flathead County
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December weather in Flathead County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | -2° /-10° | 2 mm | 0.8 cm | |
| Dec. 2 | Overcast | -1° /-6° | 0 mm | 0 cm | |
| Dec. 3 | Overcast | -1° /-6° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 0° /-5° | 4.1 mm | 1.7 cm | |
| Dec. 5 | Overcast | -1° /-5° | 6.3 mm | 4.6 cm | |
| Dec. 6 | Overcast | 0° /-3° | 0 mm | 0 cm | |
| Dec. 7 |  Moderate rain at times | 2° /-2° | 1.5 mm | 0 cm | |
| Dec. 8 |  Light freezing rain | 3° /-2° | 9 mm | 5.1 cm | |
| Dec. 9 | Light freezing rain | 2° /-2° | 3.4 mm | 0 cm | |
| Dec. 10 | Overcast | 2° /-2° | 16.5 mm | 8.5 cm | |
| Dec. 11 | Overcast | 3° /-3° | 3.3 mm | 0 cm | |
| Dec. 12 |  Cloudy | 1° /-5° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | 2° /-2° | 0 mm | 0 cm | |
| Dec. 14 | Light freezing rain | 2° /-4° | 0.2 mm | 0 cm | |
| Dec. 15 |  Patchy moderate snow | 3° /-2° | 0.6 mm | 0.3 cm | |
| Dec. 16 | Light freezing rain | 2° /-3° | 0.6 mm | 0 cm | |
| Dec. 17 | Overcast | 3° /-2° | 15.9 mm | 3.2 cm | |
| Dec. 18 | Patchy moderate snow | 2° /-1° | 9.2 mm | 5.4 cm | |
| Dec. 19 | Overcast | 2° /-3° | 4.5 mm | 2.1 cm | |
| Dec. 20 | Overcast | 1° /-3° | 0.1 mm | 0 cm | |
| Dec. 21 |  Patchy rain possible | 1° /-4° | 0.6 mm | 0 cm | |
| Dec. 22 | Overcast | 2° /-1° | 0.3 mm | 0 cm | |
| Dec. 23 | Patchy moderate snow | 2° /-2° | 0.7 mm | 0.3 cm | |
| Dec. 24 | Patchy rain possible | 2° /-2° | 6.5 mm | 4.6 cm | |
| Dec. 25 | Overcast | 1° /-1° | 0.2 mm | 0 cm | |
| Dec. 26 | Light freezing rain | 1° /-2° | 15.6 mm | 7.9 cm | |
| Dec. 27 | Light freezing rain | 0° /-5° | 2.6 mm | 1.6 cm | |
| Dec. 28 | Moderate or heavy rain shower | -2° /-7° | 7.1 mm | 0.2 cm | |
| Dec. 29 | Patchy moderate snow | 0° /-3° | 5.2 mm | 3.2 cm | |
| Dec. 30 |  Moderate snow | 0° /-6° | 1.5 mm | 0.8 cm | |
| Dec. 31 |  Mist | -1° /-7° | 0.9 mm | 0.7 cm | |
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Important Notice
Our weather forecast for Flathead County 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 Flathead County forecast closer to your planned date for the most up-to-date weather information.
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Flathead County in December - FAQ
What are the expected maximum and minimum temperatures in Flathead County 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 Flathead County during December?
Significant rainfall exceeding 118.1 mm is expected in Flathead County during December, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Flathead County in December 2026?
Flathead County experiences an average snowfall of 50.875 cm during December, occurring over 17 days.
What are the typical wind conditions in Flathead County during December?
The average wind speed in Flathead County during December is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
Flathead County snow forecast December 2026
Track daily snowfall levels and discover Flathead County’s snowy potential this December ❄️
On average, Flathead County sees 17 snowy days during December, with approximately 50.9 cm of total snowfall.
December rainfall patterns in Flathead County
Explore the daily rainfall trends and prepare for Flathead Countys December weather 💧
Typically, Flathead County has 3 rainy days in December with a total of 118.1 mm of rainfall.
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Where is Flathead County?Get accurate weather forecasts for Flathead County, located at latitude 48.683 and longitude -113.8. Stay updated with localized weather information tailored for Flathead County.
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