Québec
September
Weather in Québec for September 2025
Your guide to Québec weather in September - trends and predictions
In general, the average temperature in Québec at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.1 °C by the end of September.
Québec sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
21°/10°
Temperatures
13 km/h
Avg max wind
83 %
Avg humidity
Québec in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  19° | 3 22° | 4 25° | 5 25° | 6  26° | 7  25° |
| 8  19° | 9 19° | 10  17° | 11 20° | 12 20° | 13  21° | 14 18° |
| 15 22° | 16 21° | 17 25° | 18 23° | 19 19° | 20 18° | 21 19° |
| 22 20° | 23 19° | 24 20° | 25  15° | 26 15° | 27 19° | 28 19° |
| 29 19° | 30 20° |
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Temperatures trend during September in Québec
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 23° /7° | 4.4 mm | 6 | |
| 2 Sept. | Mist | 19° /8° | 0.1 mm | 4 | |
| 3 Sept. | Mist | 22° /9° | 0 mm | 6 | |
| 4 Sept. | Mist | 25° /12° | 0 mm | 6 | |
| 5 Sept. | Fog | 25° /14° | 0 mm | 6 | |
| 6 Sept. | Patchy light rain with thunder | 26° /14° | 0.4 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 25° /13° | 7.3 mm | 6 | |
| 8 Sept. | Light rain shower | 19° /11° | 6.6 mm | 5 | |
| 9 Sept. | Mist | 19° /9° | 0.2 mm | 5 | |
| 10 Sept. | Moderate rain | 17° /8° | 1.7 mm | 4 | |
| 11 Sept. | Mist | 20° /9° | 3.3 mm | 5 | |
| 12 Sept. | Mist | 20° /11° | 0 mm | 5 | |
| 13 Sept. | Heavy rain | 21° /13° | 19.8 mm | 5 | |
| 14 Sept. | Fog | 18° /11° | 0 mm | 5 | |
| 15 Sept. | Mist | 22° /8° | 0 mm | 5 | |
| 16 Sept. | Moderate rain | 21° /13° | 2.2 mm | 5 | |
| 17 Sept. | Mist | 25° /12° | 0.1 mm | 6 | |
| 18 Sept. | Fog | 23° /15° | 0.5 mm | 6 | |
| 19 Sept. | Moderate rain | 19° /13° | 13.8 mm | 5 | |
| 20 Sept. | Fog | 18° /11° | 0.4 mm | 4 | |
| 21 Sept. | Mist | 19° /8° | 0 mm | 5 | |
| 22 Sept. | Mist | 20° /7° | 0 mm | 6 | |
| 23 Sept. | Mist | 19° /8° | 0 mm | 5 | |
| 24 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 25 Sept. | Sunny | 15° /9° | 0.9 mm | 4 | |
| 26 Sept. | Partly cloudy | 15° /7° | 59.4 mm | 4 | |
| 27 Sept. | Sunny | 19° /9° | 0 mm | 5 | |
| 28 Sept. | Mist | 19° /8° | 0 mm | 5 | |
| 29 Sept. | Mist | 19° /7° | 0 mm | 5 | |
| 30 Sept. | Mist | 20° /9° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Québec in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Québec forecast closer to your planned date for the most up-to-date weather information.
Québec in September - FAQ
What are the expected maximum and minimum temperatures in Québec during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Québec during September?
Significant rainfall exceeding 101.3 mm is expected in Québec during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Québec during September?
The average wind speed in Québec during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Québec
Explore the daily rainfall trends and prepare for Québecs September weather 💧
UV exposure in Québec during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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