Montréal Weather in September

Montréal in September sees high daytime temperatures of 22°C (72°F) and nighttime lows of 11°C (52°F). Rainfall is fairly high this month at around 102 mm (4 in), so pack a rain jacket to stay dry.

Rainfall in Montréal in September

You can expect rain on around 11 days based on historical patterns, with 102 mm (4 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Montréal in September

Daytime temperatures in Montréal reach 22°C (72°F) in September, dropping to 11°C (52°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Montréal in September

The area enjoys a balanced 183 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Wind Speed in Montréal in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in September

The water sits at 20°C (68°F), which is a nice temperature for swimming. Not too cold, not too warm, most visitors are happy to spend time in the water.

If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August and September typically offer the best circumstances for Montréal.