Weather in Montreal in September 2024
Average weather
Average temperature in Montreal in September
The expected average maximum temperature in September is +70°F with a maximum of +84°F and a minimum of +41°F.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +66°F to +64°F.
Is Montreal warm or cold in September?
Montreal is typically mild in September.
Maximum temperatures go down compared to the previous month from +77°F to +70°F. The minimum temperature also goes down from +63°F to +54°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Montreal:
Climate in Montreal in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +77°F | +70°F | +55°F | ||||
| Min. temperature | ||||||
| +43°F | +27°F | +21°F | ||||
| Max. temperature | ||||||
| +95°F | +93°F | +81°F | ||||
| Rainfall | ||||||
| 96 mm | 99 mm | 104 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 70% | 72% | 72% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 8 | 8 | 6 | ||||
| Cloudy days | ||||||
| 15 | 14 | 17 | ||||
| Rainy days | ||||||
| 8 | 8 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +77°F in the day, the average maximum temperature lowers to +70°F. Prepare for more rain. Average rainfall goes from 96 mm to 99 mm. Humidity rises from 70% to 72%. Winds are stronger in comparison to August, going up from 2 m/s to 3 m/s on average. The amount of sunny days stay about the same, averaging 8 sunny days during the month.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Montreal is gradually decreasing during September, going from 5 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Montreal?
Climate Change Over the Years
The climate in Montreal in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+65°F) and the highest in 2015 (+77°F). The driest year was 1984 with only 38 mm of rainfall, and the wettest year was 2022 with 403 mm.
FAQ
Is September a good time to visit Montreal?
Can you sunbathe in Montreal in September?
Is Montreal rainy in September?
Is it sunny in Montreal in September?
Other cities in Canada
Monthly weather in Montreal
Source of the data
For this page, we’ve looked at the typical weather in Montreal, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.