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Weather in Laval for September 2026

Your guide to Laval weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Laval is slightly cooler than the historical average by 1 °C.

  • The forecast for the next days in Laval predicts a temperature of 18.4 °C, which is cooler than the historical average.

  • In general, the average temperature in Laval at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Laval in September is notably wet, with an average of 13 rainy days, and a total of 141.6 mm of precipitation.

    • More

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

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
72 %
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
24°
3
Fog
25°
4
Mist
26°
5
Mist
25°
6
Mist
25°
7
Light rain shower
23°
8
Light rain shower
21°
9
Cloudy
21°
10
Moderate rain
22°
11
Overcast
21°
12
Overcast
23°
13
Light rain shower
23°
14
Sunny
18°
15
Overcast
20°
16
Overcast
23°
17
Light rain shower
19°
18
Sunny
18°
19
Sunny
19°
20
Sunny
16°
21
Sunny
18°
22
Sunny
15°
23
Overcast
15°
24
Overcast
14°
25
Overcast
17°
26
Partly cloudy
21°
27
Partly cloudy
20°
28
Partly cloudy
22°
29
Mist
23°
30
Mist
22°

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° 1.8 mm 5
2 Sept. Mist
Mist
 24° /13° 35.7 mm 5
3 Sept. Fog
Fog
 25° /14° 35.7 mm 6
4 Sept. Mist
Mist
 26° /15° 25.3 mm 6
5 Sept. Mist
Mist
 25° /14° 10.3 mm 6
6 Sept. Mist
Mist
 25° /15° 5 mm 6
7 Sept. Light rain shower
Light rain shower
 23° /12° 6.1 mm 5
8 Sept. Light rain shower
Light rain shower
 21° /11° 12.1 mm 4
9 Sept. Cloudy
Cloudy
 21° /9° 4.6 mm 4
10 Sept. Moderate rain
Moderate rain
 22° /11° 1.6 mm 5
11 Sept. Overcast
Overcast
 21° /11° 0.8 mm 6
12 Sept. Overcast
Overcast
 23° /11° 0 mm 5.2
13 Sept. Light rain shower
Light rain shower
 23° /17° 3.2 mm 3.7
14 Sept. Sunny
Sunny
 18° /11° 1.2 mm 4.9
15 Sept. Overcast
Overcast
 20° /10° 0 mm 5
16 Sept. Overcast
Overcast
 23° /17° 0 mm 5
17 Sept. Light rain shower
Light rain shower
 19° /16° 70.6 mm 4
18 Sept. Sunny
Sunny
 18° /11° 0 mm 5
19 Sept. Sunny
Sunny
 19° /13° 0 mm 5
20 Sept. Sunny
Sunny
 16° /10° 0 mm 5
21 Sept. Sunny
Sunny
 18° /9° 0 mm 5
22 Sept. Sunny
Sunny
 15° /7° 0 mm 4
23 Sept. Overcast
Overcast
 15° /8° 0 mm 3
24 Sept. Overcast
Overcast
 14° /10° 0.1 mm 3
25 Sept. Overcast
Overcast
 17° /11° 0 mm 5
26 Sept. Partly cloudy
Partly cloudy
 21° /11° 40.3 mm 5
27 Sept. Partly cloudy
Partly cloudy
 20° /8° 0 mm 6
28 Sept. Partly cloudy
Partly cloudy
 22° /12° 0 mm 5
29 Sept. Mist
Mist
 23° /10° 0 mm 6
30 Sept. Mist
Mist
 22° /10° 0 mm 5
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 141.6 mm is expected in Laval during September, occurring over more than 13 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 💧
Typically, Laval has 13 rainy days in September with a total of 141.6 mm of rainfall.

UV exposure in Laval during September

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

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Location coordinates Where is Laval?

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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