Helena (MT)
December
Weather in Helena, Montana for December 2026
Your guide to Helena weather in December - trends and predictions
Helena typically experiences moderate snowfall in December, with an average of 6 snowy days.
In general, the average temperature in Helena at the beginning of December is 3.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 2.6 °C by the end of December.
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Snow Forecast ❄️
Temperatures
More
24
Dry days
1
Rainy days
6
Snow days
3°/-4°
Temperatures
15 km/h
Avg max wind
72 %
Avg humidity
Helena Weather December
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Temperatures trend during December in Helena
See the weather trend as well as the moving average line
December weather in Helena day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Cloudy | 1° /-8° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 3° /-5° | 0 mm | 0 cm | |
| Dec. 3 |  Partly cloudy | 4° /-7° | 0 mm | 0 cm | |
| Dec. 4 | Sunny | 4° /-5° | 0 mm | 0 cm | |
| Dec. 5 | Sunny | 4° /-6° | 2.3 mm | 1.7 cm | |
| Dec. 6 | Sunny | 5° /-4° | 0 mm | 0 cm | |
| Dec. 7 |  Overcast | 6° /-2° | 0.3 mm | 0 cm | |
| Dec. 8 |  Light freezing rain | 4° /-2° | 0.1 mm | 0 cm | |
| Dec. 9 | Partly cloudy | 2° /-4° | 0 mm | 0 cm | |
| Dec. 10 | Partly cloudy | 5° /-3° | 4.2 mm | 2.3 cm | |
| Dec. 11 | Overcast | 6° /-1° | 0.1 mm | 0 cm | |
| Dec. 12 | Partly cloudy | 2° /-4° | 1.6 mm | 1.2 cm | |
| Dec. 13 | Overcast | 4° /-5° | 0 mm | 0 cm | |
| Dec. 14 | Overcast | 7° /-2° | 0 mm | 0 cm | |
| Dec. 15 |  Moderate or heavy snow showers | 4° /-4° | 3.6 mm | 2.2 cm | |
| Dec. 16 | Light freezing rain | 3° /-4° | 0.6 mm | 0 cm | |
| Dec. 17 | Partly cloudy | 2° /-5° | 2.6 mm | 0 cm | |
| Dec. 18 |  Patchy rain possible | 4° /-3° | 0.2 mm | 0 cm | |
| Dec. 19 | Partly cloudy | 2° /-6° | 0 mm | 0 cm | |
| Dec. 20 | Overcast | 3° /-5° | 0 mm | 0 cm | |
| Dec. 21 | Overcast | 3° /-5° | 0 mm | 0 cm | |
| Dec. 22 | Partly cloudy | 4° /-2° | 0.2 mm | 0 cm | |
| Dec. 23 | Overcast | 6° /-3° | 0 mm | 0 cm | |
| Dec. 24 | Overcast | 4° /-2° | 0 mm | 0 cm | |
| Dec. 25 | Overcast | 5° /-2° | 2.3 mm | 1 cm | |
| Dec. 26 | Light freezing rain | 4° /-2° | 0.3 mm | 0 cm | |
| Dec. 27 | Cloudy | 1° /-10° | 0 mm | 0 cm | |
| Dec. 28 | Light freezing rain | 0° /-9° | 0.2 mm | 0 cm | |
| Dec. 29 |  Patchy moderate snow | 2° /-6° | 1.4 mm | 0.3 cm | |
| Dec. 30 | Light freezing rain | 3° /-6° | 0.3 mm | 0 cm | |
| Dec. 31 | Overcast | 3° /-7° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Helena 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 Helena forecast closer to your planned date for the most up-to-date weather information.
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Helena in December - FAQ
What are the expected maximum and minimum temperatures in Helena 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 Helena during December?
In December, Helena can expect light to moderate rainfall, totaling 20.2 mm across approximately 1 days. Occasional showers are possible, and planning ahead for them could be helpful.
Will it snow in Helena in December 2026?
Helena experiences an average snowfall of 8.56 cm during December, occurring over 6 days.
What are the typical wind conditions in Helena during December?
The average wind speed in Helena during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
Helena snow forecast December 2026
Track daily snowfall levels and discover Helena’s snowy potential this December ❄️
On average, Helena sees 6 snowy days during December, with approximately 8.6 cm of total snowfall.
December rainfall patterns in Helena
Explore the daily rainfall trends and prepare for Helenas December weather 💧
Typically, Helena has 1 rainy days in December with a total of 20.2 mm of rainfall.
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