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The temperatures in Montreal in October are quite cold with temperatures between 6°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Montreal. 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.
Please note that Montreal can expect a few days of snow in October.
Our weather forecast can give you a great sense of what weather to expect in Montreal in October 2025.
If you’re planning to visit Montreal in the near future, we highly recommend that you review the 14 day weather forecast for Montreal before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -13° | 4 | 5 | 21 | 122 mm | Awful | Montreal in January |
| February | -5° / -12° | 5 | 3 | 21 | 128 mm | Awful | Montreal in February |
| March | 1° / -6° | 8 | 8 | 16 | 120 mm | Awful | Montreal in March |
| April | 10° / 2° | 10 | 15 | 6 | 159 mm | Awful | Montreal in April |
| May | 19° / 9° | 10 | 21 | 0 | 172 mm | Ok | Montreal in May |
| June | 23° / 13° | 8 | 22 | 0 | 183 mm | Good | Montreal in June |
| July | 26° / 16° | 8 | 23 | 0 | 157 mm | Good | Montreal in July |
| August | 25° / 16° | 7 | 24 | 0 | 157 mm | Good | Montreal in August |
| September | 21° / 12° | 6 | 24 | 0 | 127 mm | Good | Montreal in September |
| October | 13° / 6° | 9 | 21 | 1 | 167 mm | Bad | Montreal in October |
| November | 5° / 0° | 8 | 15 | 7 | 113 mm | Awful | Montreal in November |
| December | -2° / -7° | 7 | 8 | 16 | 139 mm | Awful | Montreal in December |