Idaho (Boise)
December
Weather in Idaho for December 2025
Your guide to Idaho weather in December - trends and predictions
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Expect heavy snowfall in Idaho during December, with an average of 16 snowy days.
According to Idaho snow forecast for December 2025, no snow is expected until the end of the month.So far, December 2025 in Idaho is slightly warmer than the historical average by 1.3 °F.
The forecast for the next days in Idaho predicts temperatures to be around 8 °F, close to the historical average.
In general, the average temperature in Idaho at the beginning of December is 4.6 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 6.9 °F by the end of December.
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Temperatures
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10
Dry days
5
Rainy days
16
Snow days
3°/-2°
Temperatures
12 km/h
Avg max wind
82 %
Avg humidity
Idaho Weather December
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What’s the Weather Like in Idaho This December?
Discover the average temperatures and weather trends across Idaho’s cities this December.
Temperatures trend during December in Idaho
See the weather trend as well as the moving average line
December weather in Idaho day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Heavy snow | 4° /-3° | 2 mm | 1.7 cm | |
| Dec. 2 | Heavy snow | 4° /-2° | 11.3 mm | 6.9 cm | |
| Dec. 3 | Heavy snow | 3° /-2° | 22.3 mm | 2.6 cm | |
| Dec. 4 |  Fog | 5° /-3° | 1.1 mm | 0 cm | |
| Dec. 5 |  Freezing fog | 5° /-1° | 3.7 mm | 0.7 cm | |
| Dec. 6 |  Light drizzle | 5° /-1° | 7.4 mm | 0 cm | |
| Dec. 7 | Mist | 6° /-1° | 2.3 mm | 1.2 cm | |
| Dec. 8 |  Light freezing rain | 4° /-1° | 0.8 mm | 0.7 cm | |
| Dec. 9 |  Overcast | 4° /-2° | 7.9 mm | 0.1 cm | |
| Dec. 10 |  Moderate snow | 5° /-1° | 0.7 mm | 0.1 cm | |
| Dec. 11 | Heavy snow | 4° /-1° | 3.4 mm | 0.2 cm | |
| Dec. 12 |  Light snow | 4° /0° | 4.7 mm | 3.4 cm | |
| Dec. 13 |  Sunny | 6° /0° | 0 mm | 0 cm | |
| Dec. 14 |  Patchy rain possible | 4° /0° | 36.6 mm | 1.4 cm | |
| Dec. 15 | Sunny | 3° /-2° | 7.6 mm | 5.5 cm | |
| Dec. 16 |  Partly cloudy | 5° /0° | 12.4 mm | 5.1 cm | |
| Dec. 17 | Sunny | 5° /0° | 14 mm | 6.5 cm | |
| Dec. 18 | Patchy rain possible | 3° /-1° | 15.7 mm | 3.4 cm | |
| Dec. 19 | Patchy light drizzle | 6° /-1° | 1.4 mm | 0 cm | |
| Dec. 20 |  Cloudy | 6° /0° | 0 mm | 0 cm | |
| Dec. 21 |  Heavy rain | 5° /2° | 37.9 mm | 0 cm | |
| Dec. 22 | Patchy rain possible | 7° /4° | 2.9 mm | 0 cm | |
| Dec. 23 |  Moderate rain | 10° /4° | 8.6 mm | 0 cm | |
| Dec. 24 | Moderate rain | 10° /4° | 11.2 mm | 0 cm | |
| Dec. 25 | Patchy rain possible | 10° /2° | 1.3 mm | 0 cm | |
| Dec. 26 | Patchy rain possible | 7° /3° | 0.4 mm | 0 cm | |
| Dec. 27 | Patchy rain possible | 9° /5° | 0.5 mm | 0 cm | |
| Dec. 28 | Partly cloudy | 6° /2° | 0.1 mm | 0 cm | |
| Dec. 29 | Sunny | 5° /-1° | 0 mm | 0 cm | |
| Dec. 30 | Partly cloudy | 5° /1° | 0 mm | 0 cm | |
| Dec. 31 | Patchy rain possible | 6° /5° | 0.4 mm | 0 cm | |
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Important Notice
Our weather forecast for Idaho 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 Idaho forecast closer to your planned date for the most up-to-date weather information.
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Idaho in December - FAQ
What are the expected maximum and minimum temperatures in Idaho 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 Idaho during December?
Significant rainfall exceeding 307.1 mm is expected in Idaho during December, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Idaho in December 2025?
Idaho experiences an average snowfall of 95.61 cm during December, occurring over 16 days.
What are the typical wind conditions in Idaho during December?
The average wind speed in Idaho during December is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
Idaho snow forecast December 2025
Track daily snowfall levels and discover Idaho’s snowy potential this December ❄️
On average, Idaho sees 16 snowy days during December, with approximately 95.6 cm of total snowfall.
December rainfall patterns in Idaho
Explore the daily rainfall trends and prepare for Idahos December weather 💧
Typically, Idaho has 5 rainy days in December with a total of 307.1 mm of rainfall.
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