Alliston
December
Weather in Alliston for December 2025
Your guide to Alliston weather in December - trends and predictions
Expect heavy snowfall in Alliston during December, with an average of 17 snowy days.
In general, the average temperature in Alliston at the beginning of December is 0.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 2.4 °C by the end of December.
New! Chat with our AI weatherman - it’s amazing and free.
Snow Forecast ❄️
Temperatures
More
9
Dry days
5
Rainy days
17
Snow days
1°/-2°
Temperatures
19 km/h
Avg max wind
87 %
Avg humidity
Alliston Weather December
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  1° | 2  1° | 3 1° | 4  0° | 5  0° | 6  -1° | |
| 7 1° | 8 3° | 9  6° | 10  5° | 11  0° | 12  1° | 13 -1° |
| 14 1° | 15  3° | 16 3° | 17  5° | 18 3° | 19  -1° | 20 -0° |
| 21 -3° | 22 -3° | 23  0° | 24 1° | 25 1° | 26 2° | 27  3° |
| 28 3° | 29 4° | 30  3° | 31 1° |
You can click on date
Access Alliston weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in Alliston
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. | Heavy snow | 1° /-1° | 4.4 mm | 3.5 cm | |
| 2 Dec. | Light sleet | 1° /-1° | 7.3 mm | 3.2 cm | |
| 3 Dec. | Heavy snow | 1° /-2° | 7.3 mm | 4.7 cm | |
| 4 Dec. | Overcast | 0° /-2° | 0 mm | 0 cm | |
| 5 Dec. | Mist | 0° /-6° | 2.9 mm | 0.9 cm | |
| 6 Dec. | Patchy light snow | -1° /-6° | 9.3 mm | 6.7 cm | |
| 7 Dec. | Heavy snow | 1° /-4° | 1.7 mm | 1.4 cm | |
| 8 Dec. | Overcast | 3° /-2° | 2.1 mm | 0.6 cm | |
| 9 Dec. | Thundery outbreaks possible | 6° /0° | 2.3 mm | 0.7 cm | |
| 10 Dec. | Moderate snow | 5° /0° | 3.3 mm | 2 cm | |
| 11 Dec. | Moderate or heavy snow showers | 0° /-2° | 1.6 mm | 1.3 cm | |
| 12 Dec. | Light snow showers | 1° /-3° | 14 mm | 10.1 cm | |
| 13 Dec. | Patchy light snow | -1° /-5° | 0.2 mm | 0 cm | |
| 14 Dec. | Overcast | 1° /-6° | 0 mm | 0 cm | |
| 15 Dec. | Partly cloudy | 3° /0° | 1.9 mm | 0.6 cm | |
| 16 Dec. | Mist | 3° /1° | 0.9 mm | 0 cm | |
| 17 Dec. | Light drizzle | 5° /1° | 2.7 mm | 0 cm | |
| 18 Dec. | Light snow showers | 3° /-2° | 12 mm | 7 cm | |
| 19 Dec. | Cloudy | -1° /-5° | 0.9 mm | 0 cm | |
| 20 Dec. | Overcast | 0° /-3° | 0 mm | 0 cm | |
| 21 Dec. | Cloudy | -3° /-7° | 0 mm | 0 cm | |
| 22 Dec. | Overcast | -3° /-10° | 0 mm | 0 cm | |
| 23 Dec. | Light freezing rain | 0° /-4° | 10.4 mm | 5.6 cm | |
| 24 Dec. | Fog | 1° /-3° | 8.7 mm | 6.3 cm | |
| 25 Dec. | Fog | 1° /-2° | 0 mm | 0 cm | |
| 26 Dec. | Light drizzle | 2° /-1° | 0.7 mm | 0 cm | |
| 27 Dec. | Moderate rain | 3° /1° | 13.7 mm | 0 cm | |
| 28 Dec. | Light drizzle | 3° /1° | 0.9 mm | 0 cm | |
| 29 Dec. | Light drizzle | 4° /2° | 20.5 mm | 0 cm | |
| 30 Dec. | Sunny | 3° /-1° | 6.5 mm | 1.4 cm | |
| 31 Dec. | Moderate snow | 1° /-1° | 2.5 mm | 1.9 cm | |
| Next | |||||
Important Notice
Our weather forecast for Alliston 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 Alliston forecast closer to your planned date for the most up-to-date weather information.
Alliston in December - FAQ
What are the expected maximum and minimum temperatures in Alliston 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 Alliston during December?
Significant rainfall exceeding 138.7 mm is expected in Alliston during December, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Alliston in December 2025?
Alliston experiences an average snowfall of 57.685 cm during December, occurring over 17 days.
What are the typical wind conditions in Alliston during December?
The average wind speed in Alliston during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Alliston snow forecast December 2025
Track daily snowfall levels and discover Alliston’s snowy potential this December ❄️
December rainfall patterns in Alliston
Explore the daily rainfall trends and prepare for Allistons December weather 💧
Quick links
You are here
Where is Alliston?Get accurate weather forecasts for Alliston, located at latitude 44.15 and longitude -79.866. Stay updated with localized weather information tailored for Alliston.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.