Montreal has a semi-continental climate with warm, humid summers and blistering cold winters. The harsh Canadian winters will likely be the biggest adjustment for expats moving to Montreal. Temperatures can drop to -4°F (-20°C), and it can feel even colder with the wind chill. The coldest month is January when the temperature averages at 14°F (-10°C). Expats will see a lot of snow in winter with instances of rain and sleet.

The suburbs tend to be a few degrees colder than the city centre in winter, so expats should be aware of ice on the roads and sidewalks.

Summers in Montreal are warm and rainy with high humidity levels. The mercury in July usually averages around 77°F (25°C), and expats can expect lots of sunshine.