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Weather in Sarnia for December 2026

Your guide to Sarnia weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 5 snowy days, Sarnia usually enjoys a light touch of snow in December.

    • Temperatures

  • In general, the average temperature in Sarnia at the beginning of December is 1.2 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 3.6 °C by the end of December.

    • More

  • Is December a good time to visit Sarnia? check out the best time to travel to Sarnia page.

  • ✨ Is December a good time to visit Sarnia? – Ask the AI Weatherman

Average dry days
20
Dry days
Average rainy days
6
Rainy days
Average snowy days
5
Snow days
Average temperatures
2°/-2°
Temperatures
Average wind speed
27 km/h
Avg max wind
Average humidity
83 %
Avg humidity

Sarnia Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain
1°
2
Light rain
3°
3
Moderate rain
2°
4
Light snow
1°
5
Overcast
0°
6
Overcast
0°
7
Patchy rain possible
2°
8
Patchy rain possible
2°
9
Light rain
6°
10
Light snow
4°
11
Light freezing rain
0°
12
Partly cloudy
1°
13
Partly cloudy
-1°
14
Overcast
1°
15
Light rain
2°
16
Patchy rain possible
4°
17
Patchy rain possible
4°
18
Moderate rain
4°
19
Light snow
1°
20
Light snow
2°
21
Overcast
0°
22
Patchy rain possible
1°
23
Light rain
2°
24
Light snow
2°
25
Mist
4°
26
Light rain
3°
27
Patchy rain possible
4°
28
Light rain
6°
29
Heavy rain
5°
30
Light rain
1°
31
Light snow
1°

Temperatures trend during December in Sarnia

See the weather trend as well as the moving average line

December weather in Sarnia day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
1 Dec. Light rain
Light rain
 1° /-2° 3.9 mm 0 cm
2 Dec. Light rain
Light rain
 3° /0° 2.2 mm 0 cm
3 Dec. Moderate rain
Moderate rain
 2° /-2° 5.1 mm 0 cm
4 Dec. Light snow
Light snow
 1° /-3° 1.1 mm 0.3 cm
5 Dec. Overcast
Overcast
 0° /-4° 0.1 mm 0.1 cm
6 Dec. Overcast
Overcast
 0° /-3° 0 mm 0 cm
7 Dec. Patchy rain possible
Patchy rain possible
 2° /-2° 1.2 mm 0.9 cm
8 Dec. Patchy rain possible
Patchy rain possible
 2° /-2° 0 mm 0 cm
9 Dec. Light rain
Light rain
 6° /0° 4.3 mm 0 cm
10 Dec. Light snow
Light snow
 4° /0° 9 mm 2.4 cm
11 Dec. Light freezing rain
Light freezing rain
 0° /-3° 0.1 mm 0 cm
12 Dec. Partly cloudy
Partly cloudy
 1° /-4° 0 mm 0 cm
13 Dec. Partly cloudy
Partly cloudy
 -1° /-7° 0 mm 0 cm
14 Dec. Overcast
Overcast
 1° /-6° 0 mm 0 cm
15 Dec. Light rain
Light rain
 2° /-3° 3.4 mm 0 cm
16 Dec. Patchy rain possible
Patchy rain possible
 4° /0° 1.3 mm 0 cm
17 Dec. Patchy rain possible
Patchy rain possible
 4° /2° 1.3 mm 0 cm
18 Dec. Moderate rain
Moderate rain
 4° /-1° 10.9 mm 0.3 cm
19 Dec. Light snow
Light snow
 1° /-3° 2.2 mm 0 cm
20 Dec. Light snow
Light snow
 2° /-2° 2.5 mm 1.8 cm
21 Dec. Overcast
Overcast
 0° /-4° 0 mm 0 cm
22 Dec. Patchy rain possible
Patchy rain possible
 1° /-5° 2.3 mm 1.6 cm
23 Dec. Light rain
Light rain
 2° /0° 8.8 mm 4.4 cm
24 Dec. Light snow
Light snow
 2° /1° 1.9 mm 1.4 cm
25 Dec. Mist
Mist
 4° /1° 0 mm 0 cm
26 Dec. Light rain
Light rain
 3° /2° 2.9 mm 0 cm
27 Dec. Patchy rain possible
Patchy rain possible
 4° /2° 1.3 mm 0 cm
28 Dec. Light rain
Light rain
 6° /2° 9.3 mm 0 cm
29 Dec. Heavy rain
Heavy rain
 5° /2° 39.5 mm 0.5 cm
30 Dec. Light rain
Light rain
 1° /-1° 5.7 mm 0.6 cm
31 Dec. Light snow
Light snow
 1° /-2° 5.7 mm 1 cm
Next
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.
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Sarnia in December - FAQ

What are the expected maximum and minimum temperatures in Sarnia during December?
Brace for cold days with temperatures not exceeding 2° 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 126.1 mm is expected in Sarnia during December, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Sarnia in December 2026?
Sarnia experiences an average snowfall of 15.1 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 27 km/h, suggesting breezy to windy conditions, depending on your activities.

Sarnia snow forecast December 2026

Track daily snowfall levels and discover Sarnia’s snowy potential this December ❄️
On average, Sarnia sees 5 snowy days during December, with approximately 15.1 cm of total snowfall.

December rainfall patterns in Sarnia

Explore the daily rainfall trends and prepare for Sarnias December weather 💧
Typically, Sarnia has 6 rainy days in December with a total of 126.1 mm of rainfall.
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Location coordinates Where is Sarnia?

Get accurate weather forecasts for Sarnia, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Sarnia.

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