Monthly climate guide
Quebec City weather in September
Expect mild weather in Quebec City in September: afternoons reach about 18°C (64°F), while nights drop to around 9°C (47°F). Around 108 mm of rain falls over the month (wet), and skies are often cloudy. Daytime highs are 4°C cooler than August and 8°C warmer than October.
What stands out in September
- Temperatures are falling — expect highs around 8°C lower by October.
- Seasonally, September counts as early autumn in Quebec City.
- Quebec City is usually about 4°C cooler than Montreal, 230 km away, in September.
- It's one of the sunniest months here, with cloud cover around 57%.
Avg high
18°C
64°F
Avg low
9°C
47°F
Rainfall
108 mm
wet
Humidity
84%
relative
Sky
57%
cloud · often cloudy
Quebec City weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -9°C / 16°F | -19°C / -2°F | 79 mm | 97% | 68% |
| February | -8°C / 18°F | -18°C / -1°F | 68 mm | 96% | 67% |
| March | -3°C / 26°F | -12°C / 10°F | 81 mm | 94% | 63% |
| April | 4°C / 40°F | -4°C / 25°F | 103 mm | 87% | 68% |
| May | 15°C / 59°F | 5°C / 40°F | 114 mm | 82% | 69% |
| June | 20°C / 67°F | 10°C / 50°F | 124 mm | 82% | 65% |
| July | 23°C / 73°F | 14°C / 57°F | 119 mm | 83% | 59% |
| August | 22°C / 71°F | 13°C / 56°F | 126 mm | 85% | 60% |
| September | 18°C / 64°F | 9°C / 47°F | 108 mm | 84% | 57% |
| October | 10°C / 50°F | 3°C / 37°F | 133 mm | 87% | 70% |
| November | 2°C / 35°F | -5°C / 23°F | 88 mm | 89% | 74% |
| December | -5°C / 22°F | -14°C / 7°F | 95 mm | 96% | 76% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Quebec City?
Compare the months in the chart above to find your ideal window.
Best time to visit Quebec City →Other Canada cities in September
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Quebec City weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/canada/quebec-city/september
<a href="https://weathercompare.eu/weather/canada/quebec-city/september">Quebec City weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/canada/quebec-city" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Quebec City weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/canada/quebec-city/september">Quebec City weather in September</a> – WeatherCompare</p>
Quebec City in September: quick answers
Is September a good time to visit Quebec City?
Yes. September is one of the best months for Quebec City, with highs around 18°C and about 108 mm of rain.
How warm is Quebec City in September?
Average highs are about 18°C (64°F) and average lows about 9°C (47°F), based on 10 years of daily data.
Does it rain a lot in Quebec City in September?
Quebec City typically gets around 108 mm of rain in September — wet.
Figures are long-term averages for the area around Quebec City (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.