Simcoe County (Alliston)
December
Weather in Simcoe County for December 2025
Your guide to Simcoe County weather in December - trends and predictions
Expect heavy snowfall in Simcoe County during December, with an average of 17 snowy days.
In general, the average temperature in Simcoe County 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.
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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
Simcoe County Weather December
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| 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° |
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Temperatures trend during December in Simcoe County
See the weather trend as well as the moving average line
December weather day by day
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| 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 | |
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Important Notice
Our weather forecast for Simcoe 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 Simcoe County forecast closer to your planned date for the most up-to-date weather information.
Simcoe County in December - FAQ
What are the expected maximum and minimum temperatures in Simcoe 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 Simcoe County during December?
Significant rainfall exceeding 138.7 mm is expected in Simcoe County during December, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Simcoe County in December 2025?
Simcoe County experiences an average snowfall of 57.685 cm during December, occurring over 17 days.
What are the typical wind conditions in Simcoe County during December?
The average wind speed in Simcoe County during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Simcoe County snow forecast December 2025
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December rainfall patterns in Simcoe County
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Where is Simcoe County?Get accurate weather forecasts for Simcoe County, located at latitude 44.15 and longitude -79.866. Stay updated with localized weather information tailored for Simcoe County.
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