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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 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.

  • Montérégie sees moderate rainfall in September, averaging 7 rainy days.

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Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/11°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
83 %
Avg humidity

Montérégie in September average weather

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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
Mist
24° /9° 3.4 mm 5
2 Sept. Overcast
Overcast
19° /9° 0.7 mm 4
3 Sept. Overcast
Overcast
23° /10° 0 mm 6
4 Sept. Mist
Mist
26° /13° 0 mm 7
5 Sept. Fog
Fog
26° /15° 0 mm 6
6 Sept. Mist
Mist
27° /16° 0.1 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
25° /14° 8.7 mm 6
8 Sept. Light rain shower
Light rain shower
20° /11° 5 mm 5
9 Sept. Cloudy
Cloudy
18° /8° 0 mm 5
10 Sept. Light rain shower
Light rain shower
17° /10° 2 mm 4
11 Sept. Fog
Fog
20° /11° 2.3 mm 5
12 Sept. Mist
Mist
22° /12° 0 mm 6
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
21° /11° 36.1 mm 5
14 Sept. Mist
Mist
20° /12° 0.2 mm 5
15 Sept. Mist
Mist
22° /10° 0 mm 5
16 Sept. Overcast
Overcast
22° /12° 0 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
23° /12° 0.1 mm 6
18 Sept. Fog
Fog
23° /13° 0.8 mm 5
19 Sept. Moderate rain
Moderate rain
21° /14° 14.9 mm 5
20 Sept. Mist
Mist
21° /11° 0 mm 5
21 Sept. Sunny
Sunny
21° /10° 0 mm 6
22 Sept. Mist
Mist
21° /10° 0 mm 5
23 Sept. Overcast
Overcast
20° /11° 0 mm 5
24 Sept. Mist
Mist
21° /11° 0 mm 6
25 Sept. Sunny
Sunny
18° /9° 9.6 mm 5
26 Sept. Sunny
Sunny
17° /9° 87.5 mm 5
27 Sept. Mist
Mist
20° /8° 1.5 mm 5
28 Sept. Mist
Mist
21° /11° 0 mm 5
29 Sept. Mist
Mist
20° /11° 0 mm 5
30 Sept. Sunny
Sunny
21° /11° 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 22° 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?
Significant rainfall exceeding 129.1 mm is expected in Montérégie during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
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 ☀️
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Location coordinates Where is Montérégie?

Get accurate weather forecasts for Montérégie, located at latitude 45.4 and longitude -72.732. Stay updated with localized weather information tailored for Montérégie.

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