Ottawa
December
Weather in Ottawa for December 2025
Your guide to Ottawa weather in December - trends and predictions
Expect heavy snowfall in Ottawa during December, with an average of 16 snowy days.
In general, the average temperature in Ottawa at the beginning of December is -0.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 0.3 °C by the end of December.
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Snow Forecast ❄️
Temperatures
More
10
Dry days
5
Rainy days
16
Snow days
1°/-4°
Temperatures
17 km/h
Avg max wind
86 %
Avg humidity
Ottawa in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  0° | 3  0° | 4  -0° | 5 -0° | 6  -3° | |
| 7 -2° | 8 -0° | 9  -0° | 10  2° | 11 0° | 12 2° | 13  -1° |
| 14  -1° | 15 1° | 16  1° | 17  4° | 18 3° | 19 0° | 20 -2° |
| 21  -3° | 22 -4° | 23  -0° | 24 -2° | 25 -3° | 26 -2° | 27 -2° |
| 28 1° | 29 3° | 30  3° | 31 2° |
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Temperatures trend during December in Ottawa
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. | Fog | 2° /-1° | 0 mm | 0 cm | |
| 2 Dec. | Heavy snow | 0° /-2° | 1.4 mm | 1.2 cm | |
| 3 Dec. | Light snow | 0° /-1° | 4.7 mm | 1.6 cm | |
| 4 Dec. | Moderate snow | 0° /-3° | 14 mm | 10.8 cm | |
| 5 Dec. | Light snow | 0° /-7° | 6.2 mm | 4.5 cm | |
| 6 Dec. | Light freezing rain | -3° /-12° | 0 mm | 0 cm | |
| 7 Dec. | Light snow | -2° /-13° | 0.2 mm | 0.2 cm | |
| 8 Dec. | Mist | 0° /-7° | 17.2 mm | 12.4 cm | |
| 9 Dec. | Freezing fog | 0° /-5° | 9.8 mm | 1 cm | |
| 10 Dec. | Moderate rain | 2° /-2° | 19.6 mm | 1.8 cm | |
| 11 Dec. | Moderate snow | 0° /-2° | 12.2 mm | 2.9 cm | |
| 12 Dec. | Light snow | 2° /-6° | 7.5 mm | 5.4 cm | |
| 13 Dec. | Partly cloudy | -1° /-6° | 0.1 mm | 0 cm | |
| 14 Dec. | Cloudy | -1° /-8° | 0 mm | 0 cm | |
| 15 Dec. | Partly cloudy | 1° /-5° | 0 mm | 0 cm | |
| 16 Dec. | Overcast | 1° /-3° | 0 mm | 0 cm | |
| 17 Dec. | Patchy rain possible | 4° /-1° | 6.8 mm | 0 cm | |
| 18 Dec. | Moderate rain | 3° /0° | 22.8 mm | 7 cm | |
| 19 Dec. | Heavy snow | 0° /-9° | 8 mm | 6.5 cm | |
| 20 Dec. | Partly cloudy | -2° /-6° | 0 mm | 0 cm | |
| 21 Dec. | Sunny | -3° /-9° | 0 mm | 0 cm | |
| 22 Dec. | Sunny | -4° /-11° | 0.8 mm | 0.3 cm | |
| 23 Dec. | Moderate or heavy snow showers | 0° /-9° | 14.5 mm | 5.4 cm | |
| 24 Dec. | Light freezing rain | -2° /-6° | 11.4 mm | 7.2 cm | |
| 25 Dec. | Light freezing rain | -3° /-7° | 0.4 mm | 0 cm | |
| 26 Dec. | Overcast | -2° /-8° | 0.3 mm | 0 cm | |
| 27 Dec. | Light freezing rain | -2° /-6° | 3.7 mm | 0 cm | |
| 28 Dec. | Moderate snow | 1° /-5° | 3.2 mm | 2 cm | |
| 29 Dec. | Overcast | 3° /0° | 15.7 mm | 0 cm | |
| 30 Dec. | Moderate rain at times | 3° /0° | 5.7 mm | 0.5 cm | |
| 31 Dec. | Moderate or heavy rain shower | 2° /-1° | 9 mm | 0.3 cm | |
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Important Notice
Our weather forecast for Ottawa 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 Ottawa forecast closer to your planned date for the most up-to-date weather information.
Ottawa in December - FAQ
What are the expected maximum and minimum temperatures in Ottawa 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 Ottawa during December?
Significant rainfall exceeding 162.9 mm is expected in Ottawa during December, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Ottawa in December 2025?
Ottawa experiences an average snowfall of 54.33 cm during December, occurring over 16 days.
What are the typical wind conditions in Ottawa during December?
The average wind speed in Ottawa during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
Ottawa snow forecast December 2025
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December rainfall patterns in Ottawa
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