Total precipitation is remarkably even month to month — every month gets roughly 65–105 mm. What changes is the form: winter arrives as snow, summer as rain, with two hinge months (April, November) in between. Bars show monthly precipitation split into the rain and the melted-snow portion (both in mm of water). Environment Canada 1991–2020 normals, Montréal–Trudeau.
Millimetres of water. Snow is shown as its melted (water-equivalent) depth.
Snowfall depth in centimetres — the same winter, measured as fluffy snow rather than melted water.
| Month | Precip (mm) | Rain (mm) | Snow water (mm) | Snowfall (cm) |
|---|