Click on a day for an hourly weather forecast
The weather in Ottawa in March is very cold with temperatures between -6°C and 1°C, warm clothes are a must.
You can expect rain for roughly half of the month of March in Ottawa. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Let it snow! You can expect Ottawa to be covered in white during the month of March. 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 March 2025.
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 |