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Weather in Saint John for December 2025

Your guide to Saint John weather in December - trends and predictions

    Snow Forecast ❄️

  • Saint John typically experiences moderate snowfall in December, with an average of 8 snowy days.
    According to Saint John snow forecast for December 2025, 8 snowy days are expected in the next 2 weeks. The closest date with snow is Sunday, 14 December.

    • Temperatures

  • Until now, December 2025 in Saint John is slightly cooler than the historical average by -1.8 °C.

  • The forecast for the next days in Saint John predicts a temperature of -1.8 °C, which is cooler than the historical average.

  • In general, the average temperature in Saint John at the beginning of December is 2.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of -1.6 °C by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
12
Dry days
Average rainy days
11
Rainy days
Average snowy days
8
Snow days
Average temperatures
3°/-2°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Saint John Weather December

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

Temperatures trend during December in Saint John

See the weather trend as well as the moving average line

December weather in Saint John day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
1 Dec. Overcast
Overcast
 7° /1° 15.2 mm 0 cm
2 Dec. Light rain shower
Light rain shower
 4° /-2° 9.8 mm 4.3 cm
3 Dec. Light drizzle
Light drizzle
 2° /-2° 43.6 mm 0 cm
4 Dec. Heavy snow
Heavy snow
 2° /-4° 6.2 mm 4.9 cm
5 Dec. Overcast
Overcast
 2° /-6° 38.3 mm 1.8 cm
6 Dec. Partly cloudy
Partly cloudy
 1° /-7° 0 mm 0 cm
7 Dec. Sunny
Sunny
 0° /-6° 0 mm 0 cm
8 Dec. Sunny
Sunny
 0° /-8° 19 mm 9.8 cm
9 Dec. Overcast
Overcast
 1° /-8° 0 mm 0 cm
10 Dec. Light drizzle
Light drizzle
 7° /-1° 21.2 mm 7.9 cm
11 Dec. Light rain shower
Light rain shower
 11° /1° 40 mm 0 cm
12 Dec. Partly cloudy
Partly cloudy
 5° /-2° 22.5 mm 0 cm
13 Dec. Light snow showers
Light snow showers
 1° /-5° 0.1 mm 0.1 cm
14 Dec. Patchy moderate snow
Patchy moderate snow
 -1° /-5° 0.7 mm 0.4 cm
15 Dec. Sunny
Sunny
 -3° /-7° 0 mm 0 cm
16 Dec. Partly cloudy
Partly cloudy
 -1° /-8° 0 mm 0 cm
17 Dec. Patchy rain possible
Patchy rain possible
 6° /-5° 0.2 mm 0 cm
18 Dec. Light freezing rain
Light freezing rain
 -1° /-3° 0.1 mm 0 cm
19 Dec. Patchy rain possible
Patchy rain possible
 8° /-1° 2.9 mm 0.2 cm
20 Dec. Light freezing rain
Light freezing rain
 -3° /-5° 0.3 mm 0.2 cm
21 Dec. Moderate rain
Moderate rain
 8° /0° 6.7 mm 1 cm
22 Dec. Partly cloudy
Partly cloudy
 -6° /-9° 0 mm 0 cm
23 Dec. Blizzard
Blizzard
 1° /-10° 5.5 mm 0.1 cm
24 Dec. Patchy snow possible
Patchy snow possible
 -7° /-20° 0 mm 0 cm
25 Dec. Sunny
Sunny
 -11° /-19° 0 mm 0 cm
26 Dec. Patchy moderate snow
Patchy moderate snow
 -9° /-14° 0.6 mm 0.4 cm
27 Dec. Heavy snow
Heavy snow
 -6° /-14° 2.7 mm 1.9 cm
28 Dec. Light drizzle
Light drizzle
 2° /-3° 2.5 mm 0 cm
29 Dec. Heavy snow
Heavy snow
 3° /0° 6.1 mm 2.2 cm
30 Dec. Light sleet
Light sleet
 6° /2° 17.7 mm 0 cm
31 Dec. Overcast
Overcast
 4° /1° 3 mm 0 cm
Next
Important Notice
Our weather forecast for Saint John 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 Saint John forecast closer to your planned date for the most up-to-date weather information.
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Saint John in December - FAQ

What are the expected maximum and minimum temperatures in Saint John 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 Saint John during December?
Significant rainfall exceeding 303.4 mm is expected in Saint John during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Saint John in December 2025?
Saint John experiences an average snowfall of 51.885 cm during December, occurring over 8 days.
What are the typical wind conditions in Saint John during December?
The average wind speed in Saint John during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

Saint John snow forecast December 2025

Track daily snowfall levels and discover Saint John’s snowy potential this December ❄️
On average, Saint John sees 8 snowy days during December, with approximately 51.9 cm of total snowfall.

December rainfall patterns in Saint John

Explore the daily rainfall trends and prepare for Saint Johns December weather 💧
Typically, Saint John has 11 rainy days in December with a total of 303.4 mm of rainfall.

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Location coordinates Where is Saint John?

Get accurate weather forecasts for Saint John, located at latitude 45.271 and longitude -66.056. Stay updated with localized weather information tailored for Saint John.

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