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The weather in Ottawa in December is very cold with temperatures between -8°C and -2°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Ottawa during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Ottawa to be covered in white during the month of December. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Ottawa in December 2024.
If you’re planning to visit Ottawa in the near future, we highly recommend that you review the 14 day weather forecast for Ottawa before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -14° | 5 | 5 | 22 | 89 mm | Awful | Ottawa in January |
| February | -5° / -13° | 5 | 3 | 21 | 85 mm | Awful | Ottawa in February |
| March | 1° / -6° | 8 | 8 | 16 | 85 mm | Awful | Ottawa in March |
| April | 9° / 1° | 11 | 13 | 7 | 122 mm | Awful | Ottawa in April |
| May | 18° / 8° | 8 | 23 | 1 | 116 mm | Ok | Ottawa in May |
| June | 22° / 12° | 7 | 23 | 0 | 129 mm | Ok | Ottawa in June |
| July | 25° / 15° | 6 | 25 | 0 | 129 mm | Perfect | Ottawa in July |
| August | 25° / 15° | 7 | 24 | 0 | 137 mm | Good | Ottawa in August |
| September | 21° / 10° | 5 | 25 | 0 | 102 mm | Good | Ottawa in September |
| October | 13° / 5° | 9 | 21 | 1 | 134 mm | Bad | Ottawa in October |
| November | 5° / -2° | 7 | 14 | 8 | 80 mm | Awful | Ottawa in November |
| December | -2° / -8° | 7 | 6 | 18 | 101 mm | Awful | Ottawa in December |