Weather in Quebec in September 2025
Average weather
Average temperature in Quebec in September
Going from a maximum of +32°C during the day to a minimum of +5°C during the night, the temperature in September averages around +22°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +23°C to +23°C.
Is Quebec warm or cold in September?
Quebec is typically mild in September.
Maximum temperatures go down compared to the previous month from +24°C to +19°C. The minimum temperature also goes down from +15°C to +10°C.
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 Quebec:
Climate in Quebec in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +19°C | +12°C | ||||
| Min. temperature | ||||||
| +3°C | -4°C | -8°C | ||||
| Max. temperature | ||||||
| +34°C | +33°C | +27°C | ||||
| Rainfall | ||||||
| 560 mm | 490 mm | 134 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 78% | 79% | 78% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 3 | 4 | 3 | ||||
| Cloudy days | ||||||
| 10 | 10 | 11 | ||||
| Rainy days | ||||||
| 18 | 16 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 1 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +24°C in the day, the average maximum temperature lowers to +19°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 560 mm to 490 mm. Humidity rises from 78% to 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 3 to 4.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Quebec is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Quebec?
Climate Change over Years
The climate in Quebec in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+9°C) and the highest in 2010 (+12°C). The driest year was 2001 with only 618 mm of rainfall, and the wettest year was 2023 with 44340 mm.
FAQ
Is September a good time to visit Quebec?
Can you sunbathe in Quebec in September?
Is Quebec rainy in September?
Is it sunny in Quebec in September?
Other cities in Canada
Monthly weather in Quebec
Source of the data
For this page, we’ve looked at the typical weather in Quebec, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
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.