Sarnia
December
Weather in Sarnia for December 2025
Your guide to Sarnia weather in December - trends and predictions
Sarnia typically experiences moderate snowfall in December, with an average of 8 snowy days.
In general, the average temperature in Sarnia at the beginning of December is 2.1 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 5.6 °C by the end of December.
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Snow Forecast ❄️
Temperatures
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12
Dry days
11
Rainy days
8
Snow days
3°/0°
Temperatures
25 km/h
Avg max wind
82 %
Avg humidity
Sarnia Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  4° | 3 3° | 4  2° | 5  1° | 6  0° | |
| 7  3° | 8 5° | 9 9° | 10  5° | 11  1° | 12  2° | 13 -0° |
| 14 4° | 15  6° | 16 7° | 17 5° | 18 4° | 19 0° | 20 3° |
| 21 1° | 22 2° | 23 3° | 24 4° | 25 6° | 26 6° | 27 6° |
| 28 8° | 29 6° | 30 4° | 31 3° |
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Temperatures trend during December in Sarnia
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. | Moderate rain | 2° /-1° | 5.9 mm | 0 cm | |
| 2 Dec. | Light rain | 4° /1° | 3.3 mm | 0 cm | |
| 3 Dec. | Moderate rain | 3° /-1° | 7.6 mm | 0 cm | |
| 4 Dec. | Overcast | 2° /-1° | 1.6 mm | 0.5 cm | |
| 5 Dec. | Light snow | 1° /-3° | 0.2 mm | 0.1 cm | |
| 6 Dec. | Light snow showers | 0° /-3° | 0.1 mm | 0 cm | |
| 7 Dec. | Patchy rain possible | 3° /-2° | 0 mm | 0 cm | |
| 8 Dec. | Patchy rain possible | 5° /0° | 0 mm | 0 cm | |
| 9 Dec. | Light drizzle | 9° /2° | 6.4 mm | 0 cm | |
| 10 Dec. | Moderate snow | 5° /0° | 2.5 mm | 1.2 cm | |
| 11 Dec. | Light freezing rain | 1° /-1° | 0.1 mm | 0 cm | |
| 12 Dec. | Partly cloudy | 2° /-4° | 0 mm | 0 cm | |
| 13 Dec. | Partly cloudy | 0° /-6° | 0 mm | 0 cm | |
| 14 Dec. | Overcast | 4° /-4° | 0 mm | 0 cm | |
| 15 Dec. | Sunny | 6° /0° | 5 mm | 0 cm | |
| 16 Dec. | Overcast | 7° /3° | 2 mm | 0 cm | |
| 17 Dec. | Light rain | 5° /3° | 2 mm | 0 cm | |
| 18 Dec. | Light snow showers | 4° /-1° | 1.7 mm | 0.4 cm | |
| 19 Dec. | Patchy light snow | 0° /-3° | 0.2 mm | 0 cm | |
| 20 Dec. | Partly cloudy | 3° /0° | 3.8 mm | 2.7 cm | |
| 21 Dec. | Overcast | 1° /-3° | 0 mm | 0 cm | |
| 22 Dec. | Patchy rain possible | 2° /-4° | 0.2 mm | 0 cm | |
| 23 Dec. | Light drizzle | 3° /-1° | 10.2 mm | 5.6 cm | |
| 24 Dec. | Overcast | 4° /1° | 2.9 mm | 2.1 cm | |
| 25 Dec. | Overcast | 6° /2° | 0 mm | 0 cm | |
| 26 Dec. | Light rain | 6° /3° | 4.4 mm | 0 cm | |
| 27 Dec. | Light rain shower | 6° /3° | 2 mm | 0 cm | |
| 28 Dec. | Patchy rain possible | 8° /3° | 0.1 mm | 0 cm | |
| 29 Dec. | Patchy rain possible | 6° /4° | 38.5 mm | 0 cm | |
| 30 Dec. | Sunny | 4° /0° | 7.4 mm | 0 cm | |
| 31 Dec. | Light snow | 3° /0° | 6.6 mm | 0.1 cm | |
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Important Notice
Our weather forecast for Sarnia 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 Sarnia forecast closer to your planned date for the most up-to-date weather information.
Sarnia in December - FAQ
What are the expected maximum and minimum temperatures in Sarnia 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 Sarnia during December?
Significant rainfall exceeding 114.7 mm is expected in Sarnia during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Sarnia in December 2025?
Sarnia experiences an average snowfall of 12.84 cm during December, occurring over 8 days.
What are the typical wind conditions in Sarnia during December?
The average wind speed in Sarnia during December is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
Sarnia snow forecast December 2025
Track daily snowfall levels and discover Sarnia’s snowy potential this December ❄️
December rainfall patterns in Sarnia
Explore the daily rainfall trends and prepare for Sarnias December weather 💧
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