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Weather in Laval for September 2025

Your guide to Laval weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Laval is slightly cooler than the historical average by -0.6 °C.

  • Expect cooler weather in the next days in Laval with the forecast suggesting a temperature of 21.5 °C, lower than the historical average.

  • In general, the average temperature in Laval at the beginning of September is 24.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • Laval experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 123.9 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Laval Weather September

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

Temperatures trend during September in Laval

See the weather trend as well as the moving average line

September weather in Laval day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /12° 2.3 mm 5
2 Sept. Mist
Mist
 23° /13° 0 mm 5
3 Sept. Fog
Fog
 25° /13° 0 mm 6
4 Sept. Mist
Mist
 27° /15° 9.6 mm 6
5 Sept. Mist
Mist
 27° /15° 5.2 mm 7
6 Sept. Mist
Mist
 25° /16° 6.6 mm 6
7 Sept. Light rain shower
Light rain shower
 22° /12° 8.1 mm 5
8 Sept. Light rain shower
Light rain shower
 20° /11° 8.4 mm 5
9 Sept. Cloudy
Cloudy
 21° /8° 0 mm 5
10 Sept. Moderate rain
Moderate rain
 22° /10° 2 mm 5
11 Sept. Overcast
Overcast
 22° /12° 1.1 mm 5
12 Sept. Overcast
Overcast
 23° /11° 1.1 mm 5
13 Sept. Moderate rain
Moderate rain
 21° /13° 4.6 mm 5
14 Sept. Partly cloudy
Partly cloudy
 25° /14° 0 mm 0.8
15 Sept. Partly cloudy
Partly cloudy
 24° /13° 0 mm 1.1
16 Sept. Sunny
Sunny
 25° /12° 0 mm 1.2
17 Sept. Mist
Mist
 26° /10° 0 mm 1.2
18 Sept. Patchy rain possible
Patchy rain possible
 29° /15° 2.4 mm 0
19 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 0.5 mm 3
20 Sept. Sunny
Sunny
 18° /7° 0 mm 4
21 Sept. Sunny
Sunny
 23° /8° 0 mm 5
22 Sept. Sunny
Sunny
 27° /14° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 0.3 mm 4
24 Sept. Moderate rain
Moderate rain
 17° /15° 5.4 mm 4
25 Sept. Partly cloudy
Partly cloudy
 21° /11° 0 mm 5
26 Sept. Sunny
Sunny
 12° /5° 0 mm 3
27 Sept. Sunny
Sunny
 14° /4° 0 mm 3
28 Sept. Partly cloudy
Partly cloudy
 21° /11° 0 mm 5
29 Sept. Mist
Mist
 21° /10° 0 mm 5
30 Sept. Mist
Mist
 24° /10° 0 mm 6
Next
Important Notice
Our weather forecast for Laval 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 Laval forecast closer to your planned date for the most up-to-date weather information.
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Laval in September - FAQ

What are the expected maximum and minimum temperatures in Laval 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 Laval during September?
Significant rainfall exceeding 123.9 mm is expected in Laval during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Laval during September?
The average wind speed in Laval during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Laval

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

UV exposure in Laval 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 Laval, located at latitude 45.57 and longitude -73.692. Stay updated with localized weather information tailored for Laval.

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