Montréal
September
Weather in Montréal for September 2026
Your guide to Montréal weather in September - trends and predictions
Until now, September 2026 in Montréal has been nearly identical to the historical average, with a temperature of 24 °C (showing only a slight deviation of 0.1 °C).
Expect cooler weather in the next days in Montréal with the forecast suggesting a temperature of 19.6 °C, lower than the historical average.
In general, the average temperature in Montréal at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19 °C by the end of September.
Montréal experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 136 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
22°/12°
Temperatures
14 km/h
Avg max wind
71 %
Avg humidity
Montréal Weather September
Move between months or click on a day
Temperatures trend during September in Montréal
See the weather trend as well as the moving average line
September weather in Montréal day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 24° /12° | 0.6 mm | 5 | |
| 2 Sept. |  Sunny | 24° /13° | 20.6 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 26° /15° | 25.2 mm | 6 | |
| 4 Sept. | Sunny | 25° /14° | 6 mm | 6 | |
| 5 Sept. |  Moderate or heavy rain shower | 23° /14° | 8.5 mm | 5 | |
| 6 Sept. | Overcast | 24° /14° | 5.8 mm | 6 | |
| 7 Sept. | Sunny | 24° /12° | 3.3 mm | 6 | |
| 8 Sept. | Moderate or heavy rain shower | 22° /12° | 13.3 mm | 5 | |
| 9 Sept. | Sunny | 23° /11° | 4.2 mm | 5 | |
| 10 Sept. | Sunny | 23° /12° | 2.5 mm | 5 | |
| 11 Sept. | Sunny | 20° /10° | 0 mm | 5.2 | |
| 12 Sept. | Overcast | 24° /12° | 0 mm | 5.3 | |
| 13 Sept. | Overcast | 25° /17° | 5.1 mm | 3.7 | |
| 14 Sept. | Sunny | 19° /12° | 0 mm | 4.9 | |
| 15 Sept. | Overcast | 18° /9° | 0 mm | 4 | |
| 16 Sept. | Overcast | 21° /16° | 5.2 mm | 5 | |
| 17 Sept. | Overcast | 19° /14° | 3.1 mm | 4 | |
| 18 Sept. | Patchy rain possible | 17° /12° | 0.2 mm | 5 | |
| 19 Sept. | Sunny | 19° /11° | 0 mm | 5 | |
| 20 Sept. | Sunny | 18° /9° | 0 mm | 5 | |
| 21 Sept. | Sunny | 22° /13° | 0 mm | 6 | |
| 22 Sept. | Overcast | 21° /12° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 13° /10° | 2.8 mm | 3 | |
| 24 Sept. | Sunny | 19° /10° | 0 mm | 5 | |
| 25 Sept. | Moderate or heavy rain shower | 19° /11° | 24.7 mm | 5 | |
| 26 Sept. |  Partly cloudy | 20° /11° | 35.8 mm | 5 | |
| 27 Sept. |  Mist | 18° /9° | 2.6 mm | 4 | |
| 28 Sept. | Overcast | 19° /10° | 0.1 mm | 4 | |
| 29 Sept. | Overcast | 19° /9° | 0.2 mm | 5 | |
| 30 Sept. | Sunny | 19° /8° | 0.1 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Montréal 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 Montréal forecast closer to your planned date for the most up-to-date weather information.
Change Month
Montréal in September - FAQ
What are the expected maximum and minimum temperatures in Montréal during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Montréal during September?
Significant rainfall exceeding 136 mm is expected in Montréal during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Montréal during September?
The average wind speed in Montréal during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Montréal
Explore the daily rainfall trends and prepare for Montréals September weather 💧
Typically, Montréal has 8 rainy days in September with a total of 136 mm of rainfall.
UV exposure in Montréal during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Montréal
Select a location for an accurate weather forecast
More Locations Quick links
More Montréal weather pages
You are here
Where is Montréal?Get accurate weather forecasts for Montréal, located at latitude 45.509 and longitude -73.588. Stay updated with localized weather information tailored for Montréal.
Related locations
Select a location for accurate weather forecast
GatineauJolietteLavalMont-TremblantQuébecRimouskiSaint-JérômeSalaberry-de-ValleyfieldTorontoTrois-Rivières
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.