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 18 snowy days.
According to Ottawa snow forecast for December 2025, 9 snowy days are expected in the next 2 weeks. The closest date with snow is Monday, 15 December.Until now, December 2025 in Ottawa has been significantly cooler than historical averages by -2 °C, with average temperature of -2.7 °C.
The forecast for the next days in Ottawa predicts a temperature of -5.5 °C, which is cooler than the historical average.
In general, the average temperature in Ottawa at the beginning of December is -0.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of -3.4 °C by the end of December.
New! Chat with our AI weatherman - it’s amazing and free.
Snow Forecast ❄️
Temperatures
More
10
Dry days
3
Rainy days
18
Snow days
0°/-5°
Temperatures
17 km/h
Avg max wind
86 %
Avg humidity
Ottawa Weather December
Move between months or click on a day
Temperatures trend during December in Ottawa
See the weather trend as well as the moving average line
December weather in Ottawa day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. |  Fog | 2° /-3° | 0.9 mm | 0.6 cm | |
| 2 Dec. |  Heavy snow | -1° /-3° | 0.9 mm | 0.8 cm | |
| 3 Dec. |  Light snow | 0° /-3° | 5.2 mm | 2.6 cm | |
| 4 Dec. |  Moderate snow | 0° /-6° | 9.4 mm | 7.2 cm | |
| 5 Dec. | Light snow | -1° /-9° | 4.1 mm | 3 cm | |
| 6 Dec. |  Light freezing rain | -2° /-10° | 0 mm | 0 cm | |
| 7 Dec. | Light snow | -3° /-12° | 2.8 mm | 2 cm | |
| 8 Dec. | Mist | -3° /-9° | 11.5 mm | 8.3 cm | |
| 9 Dec. |  Freezing fog | -1° /-7° | 8.6 mm | 2.1 cm | |
| 10 Dec. |  Moderate rain | 2° /-3° | 25.3 mm | 10 cm | |
| 11 Dec. | Moderate snow | -1° /-5° | 8.1 mm | 1.9 cm | |
| 12 Dec. | Light snow | 0° /-8° | 5 mm | 3.6 cm | |
| 13 Dec. |  Partly cloudy | -1° /-7° | 0 mm | 0 cm | |
| 14 Dec. |  Sunny | -7° /-17° | 0 mm | 0 cm | |
| 15 Dec. |  Moderate or heavy snow showers | -7° /-11° | 6.9 mm | 5 cm | |
| 16 Dec. |  Cloudy | -3° /-8° | 0.1 mm | 0 cm | |
| 17 Dec. | Light freezing rain | 3° /-7° | 0.4 mm | 0.1 cm | |
| 18 Dec. | Moderate or heavy snow showers | -5° /-13° | 2.8 mm | 0.3 cm | |
| 19 Dec. |  Blowing snow | 2° /-8° | 0.3 mm | 0 cm | |
| 20 Dec. | Moderate or heavy snow showers | -6° /-9° | 2.4 mm | 1.3 cm | |
| 21 Dec. | Moderate or heavy snow showers | 0° /-9° | 3.1 mm | 0.1 cm | |
| 22 Dec. | Partly cloudy | -9° /-19° | 0.1 mm | 0 cm | |
| 23 Dec. |  Blizzard | 3° /-8° | 1.4 mm | 0.1 cm | |
| 24 Dec. | Sunny | -15° /-19° | 0 mm | 0 cm | |
| 25 Dec. | Cloudy | -11° /-19° | 0 mm | 0 cm | |
| 26 Dec. | Heavy snow | -10° /-13° | 2.1 mm | 1.5 cm | |
| 27 Dec. | Cloudy | -12° /-22° | 0 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 | |
| Next | |||||
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.
Change Month
Ottawa in December - FAQ
What are the expected maximum and minimum temperatures in Ottawa during December?
Brace for cold days with temperatures not exceeding 0° 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 194.9 mm is expected in Ottawa during December, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Ottawa in December 2025?
Ottawa experiences an average snowfall of 70.8433 cm during December, occurring over 18 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
Track daily snowfall levels and discover Ottawa’s snowy potential this December ❄️
On average, Ottawa sees 18 snowy days during December, with approximately 70.8 cm of total snowfall.
December rainfall patterns in Ottawa
Explore the daily rainfall trends and prepare for Ottawas December weather 💧
Typically, Ottawa has 3 rainy days in December with a total of 194.9 mm of rainfall.
Top locations in Ottawa
Select a location for an accurate weather forecast
More Locations Quick links
More Ottawa weather pages
You are here
Where is Ottawa?Get accurate weather forecasts for Ottawa, located at latitude 45.411 and longitude -75.698. Stay updated with localized weather information tailored for Ottawa.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.