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Canada weather

Weather in Brossard for September 2025

Your guide to Brossard weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Brossard is slightly cooler than the historical average by -0.8 °C.

  • Expect cooler weather in the next days in Brossard with the forecast suggesting a temperature of 21.4 °C, lower than the historical average.

  • In general, the average temperature in Brossard at the beginning of September is 24.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18 °C by the end of September.

    • Rain 🌧️

  • Brossard experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 175 mm.

    • More

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Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Brossard Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
25°
2
Mist
23°
3
Mist
24°
4
Partly cloudy
26°
5
Fog
26°
6
Fog
25°
7
Light rain shower
24°
8
Light rain shower
20°
9
Overcast
21°
10
Light rain shower
21°
11
Overcast
22°
12
Overcast
23°
13
Light rain shower
20°
14
Partly cloudy
25°
15
Sunny
24°
16
Partly cloudy
24°
17
Partly cloudy
27°
18
Patchy rain possible
29°
19
Patchy rain possible
17°
20
Sunny
18°
21
Sunny
23°
22
Sunny
27°
23
Patchy rain possible
22°
24
Patchy rain possible
17°
25
Overcast
21°
26
Sunny
12°
27
Sunny
13°
28
Mist
20°
29
Mist
20°
30
Mist
23°

Temperatures trend during September in Brossard

See the weather trend as well as the moving average line

September weather in Brossard day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 25° /11° 1 mm 6
2 Sept. Mist
Mist
 23° /13° 0 mm 5
3 Sept. Mist
Mist
 24° /13° 0 mm 6
4 Sept. Partly cloudy
Partly cloudy
 26° /14° 5.4 mm 7
5 Sept. Fog
Fog
 26° /15° 12.1 mm 6
6 Sept. Fog
Fog
 25° /16° 16.6 mm 5
7 Sept. Light rain shower
Light rain shower
 24° /13° 6.1 mm 5
8 Sept. Light rain shower
Light rain shower
 20° /10° 11.8 mm 5
9 Sept. Overcast
Overcast
 21° /8° 0 mm 5
10 Sept. Light rain shower
Light rain shower
 21° /11° 5.1 mm 5
11 Sept. Overcast
Overcast
 22° /12° 3.8 mm 5
12 Sept. Overcast
Overcast
 23° /10° 0.4 mm 5
13 Sept. Light rain shower
Light rain shower
 20° /12° 7.1 mm 5
14 Sept. Partly cloudy
Partly cloudy
 25° /13° 0 mm 0.7
15 Sept. Sunny
Sunny
 24° /11° 0 mm 1.2
16 Sept. Partly cloudy
Partly cloudy
 24° /9° 0 mm 1.2
17 Sept. Partly cloudy
Partly cloudy
 27° /12° 0 mm 1.2
18 Sept. Patchy rain possible
Patchy rain possible
 29° /16° 3.2 mm 0
19 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.5 mm 3
20 Sept. Sunny
Sunny
 18° /8° 0 mm 4
21 Sept. Sunny
Sunny
 23° /8° 0 mm 5
22 Sept. Sunny
Sunny
 27° /13° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 0.5 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 17° /15° 4.5 mm 4
25 Sept. Overcast
Overcast
 21° /11° 0 mm 4
26 Sept. Sunny
Sunny
 12° /5° 0 mm 3
27 Sept. Sunny
Sunny
 13° /5° 0 mm 3
28 Sept. Mist
Mist
 20° /10° 0 mm 5
29 Sept. Mist
Mist
 20° /9° 0 mm 5
30 Sept. Mist
Mist
 23° /10° 0 mm 5
Next
Important Notice
Our weather forecast for Brossard 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 Brossard forecast closer to your planned date for the most up-to-date weather information.
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Brossard in September - FAQ

What are the expected maximum and minimum temperatures in Brossard 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 Brossard during September?
Significant rainfall exceeding 175 mm is expected in Brossard during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Brossard during September?
The average wind speed in Brossard during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Brossard

Explore the daily rainfall trends and prepare for Brossards September weather 💧

UV exposure in Brossard during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Brossard, located at latitude 45.45 and longitude -73.466. Stay updated with localized weather information tailored for Brossard.

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