Sarnia
December
Weather in Sarnia for December 2025
Your guide to Sarnia weather in December - trends and predictions
With an average of 5 snowy days, Sarnia usually enjoys a light touch of snow in December.
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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17
Dry days
9
Rainy days
5
Snow days
5°/1°
Temperatures
23 km/h
Avg max wind
79 %
Avg humidity
Sarnia in December average weather
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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?
During December, expect a variety of temperatures with highs around 5° and lows near 1°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sarnia during December?
Moderate rainfall is anticipated in Sarnia during December, with a total of 55.9 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
Will it snow in Sarnia in December 2025?
Sarnia experiences an average snowfall of 2.835 cm during December, occurring over 5 days.
What are the typical wind conditions in Sarnia during December?
The average wind speed in Sarnia during December is 23 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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