Québec Weather in September
What's the weather like in Québec (Quebec) in September 2025?
The climate in Québec during September can be summarized as mild and wet.
September is in the fall / autumn in Québec and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 8°C (46°F) is normal.
| Daytime temperature | 17.8°C 64°F |
|---|---|
| Nightly temperature | 7.8°C 46°F |
| Average temperature | 12.8°C 55°F |
| Daily sunshine | 5.5 hrs |
| Avg rainfall | 123 mm 4.8 ins |
| Rainy days | 15 days |
| Sea temperature | 13.7°C 56.6°F |
| Humidity | 76% |
| Windspeed | 10.8kph 7 mph |
On average September is the wettest month of the year in Québec with around 123mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.5 hours of sunshine per day.
September temperatures in Québec
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Québec in September 2025.
Other monthly averages
Best places to visit in September
Québec weather stats
| Hottest month: | July | 24.8°C 76.6°F |
|---|---|---|
| Driest month: | February | 70mm 2.8ins |
| Sunniest month: | July | 8.8hrs |
| Coldest month: | January | -7.9°C 17.8°F |
| Wettest month: | September | 123mm 4.8ins |
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