Montérégie (Boucherville)
September
Weather in Montérégie for September 2025
Your guide to Montérégie weather in September - trends and predictions
In general, the average temperature in Montérégie at the beginning of September is 25.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20 °C by the end of September.
Montérégie sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
23°/11°
Temperatures
12 km/h
Avg max wind
76 %
Avg humidity
Montérégie in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2 21° | 3 24° | 4 27° | 5 28° | 6 27° | 7  25° |
| 8  19° | 9  20° | 10 20° | 11 22° | 12 24° | 13 23° | 14 21° |
| 15 23° | 16 24° | 17  26° | 18 24° | 19  22° | 20 23° | 21 22° |
| 22 22° | 23 20° | 24 22° | 25  17° | 26 18° | 27 20° | 28 20° |
| 29 20° | 30 23° |
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Temperatures trend during September in Montérégie
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. | Mist | 25° /10° | 1.5 mm | 6 | |
| 2 Sept. | Mist | 21° /10° | 0.1 mm | 5 | |
| 3 Sept. | Fog | 24° /12° | 0 mm | 6 | |
| 4 Sept. | Fog | 27° /14° | 0 mm | 7 | |
| 5 Sept. | Fog | 28° /17° | 0 mm | 7 | |
| 6 Sept. | Fog | 27° /17° | 0 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 25° /14° | 5.9 mm | 6 | |
| 8 Sept. | Light rain shower | 19° /12° | 13.4 mm | 5 | |
| 9 Sept. | Overcast | 20° /8° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 20° /11° | 6.9 mm | 5 | |
| 11 Sept. | Mist | 22° /11° | 5.6 mm | 6 | |
| 12 Sept. | Overcast | 24° /12° | 0.6 mm | 6 | |
| 13 Sept. | Light rain shower | 23° /13° | 10.3 mm | 6 | |
| 14 Sept. | Mist | 21° /12° | 0 mm | 6 | |
| 15 Sept. | Mist | 23° /11° | 0 mm | 6 | |
| 16 Sept. | Overcast | 24° /14° | 0 mm | 6 | |
| 17 Sept. | Partly cloudy | 26° /13° | 0.1 mm | 7 | |
| 18 Sept. | Light rain shower | 24° /13° | 0.6 mm | 6 | |
| 19 Sept. | Heavy rain | 22° /14° | 11.3 mm | 5 | |
| 20 Sept. | Mist | 23° /12° | 0 mm | 6 | |
| 21 Sept. | Mist | 22° /8° | 0 mm | 5 | |
| 22 Sept. | Mist | 22° /9° | 0 mm | 5 | |
| 23 Sept. | Mist | 20° /10° | 0 mm | 5 | |
| 24 Sept. | Partly cloudy | 22° /11° | 0 mm | 6 | |
| 25 Sept. | Sunny | 17° /9° | 17.1 mm | 5 | |
| 26 Sept. | Mist | 18° /8° | 93.8 mm | 5 | |
| 27 Sept. | Mist | 20° /7° | 0 mm | 5 | |
| 28 Sept. | Mist | 20° /9° | 0 mm | 5 | |
| 29 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 30 Sept. | Mist | 23° /9° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Montérégie 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 Montérégie forecast closer to your planned date for the most up-to-date weather information.
Montérégie in September - FAQ
What are the expected maximum and minimum temperatures in Montérégie during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Montérégie during September?
Moderate rainfall is anticipated in Montérégie during September, with a total of 99.1 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Montérégie during September?
The average wind speed in Montérégie during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Montérégie
Explore the daily rainfall trends and prepare for Montérégies September weather 💧
UV exposure in Montérégie during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Montérégie
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BeloeilBouchervilleBrossardChamblyGranbyLongueuilSaint-HyacintheSaint-Jean-sur-RichelieuSalaberry-de-ValleyfieldWarden
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