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Canada weather

Weather in Longueuil for September 2027

Your guide to Longueuil weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Longueuil at the beginning of September is 24.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.5 °C by the end of September.

    • Rain 🌧️

  • Longueuil experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 221.4 mm.

    • More

  • Is September a good time to visit Longueuil? check out the best time to travel to Longueuil page.

  • ✨ Is September a good time to visit Longueuil? – Ask the AI Weatherman

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Longueuil Weather September

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

Temperatures trend during September in Longueuil

See the weather trend as well as the moving average line

September weather in Longueuil day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 25° /12° 1 mm 5
2 Sept. Heavy rain
Heavy rain
 24° /14° 30.8 mm 5
3 Sept. Heavy rain
Heavy rain
 25° /15° 37.7 mm 6
4 Sept. Light rain
Light rain
 26° /15° 8.9 mm 6.8
5 Sept. Moderate rain
Moderate rain
 25° /15° 12.8 mm 5
6 Sept. Light rain
Light rain
 24° /16° 9.9 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 24° /13° 4.9 mm 5
8 Sept. Moderate rain
Moderate rain
 20° /12° 17.9 mm 4
9 Sept. Light rain
Light rain
 21° /10° 5.1 mm 4
10 Sept. Light rain
Light rain
 22° /12° 3.7 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 2 mm 6
12 Sept. Overcast
Overcast
 23° /11° 0.3 mm 6
13 Sept. Moderate rain
Moderate rain
 21° /14° 5.7 mm 4
14 Sept. Overcast
Overcast
 20° /13° 0.3 mm 5
15 Sept. Mist
Mist
 23° /12° 0.2 mm 5
16 Sept. Overcast
Overcast
 24° /14° 0 mm 5
17 Sept. Partly cloudy
Partly cloudy
 26° /13° 0 mm 5
18 Sept. Light rain shower
Light rain shower
 24° /14° 0.3 mm 5.5
19 Sept. Heavy rain
Heavy rain
 20° /11° 5.8 mm 5
20 Sept. Overcast
Overcast
 20° /9° 0.2 mm 5
21 Sept. Overcast
Overcast
 20° /8° 0 mm 4
22 Sept. Mist
Mist
 19° /9° 0.6 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 1.2 mm 5
24 Sept. Sunny
Sunny
 22° /11° 0 mm 5
25 Sept. Heavy rain
Heavy rain
 19° /11° 29.8 mm 4
26 Sept. Heavy rain
Heavy rain
 21° /11° 41.9 mm 4
27 Sept. Mist
Mist
 20° /10° 0.1 mm 4
28 Sept. Mist
Mist
 20° /11° 0.4 mm 4
29 Sept. Mist
Mist
 21° /10° 0.1 mm 4.5
30 Sept. Mist
Mist
 21° /10° 0 mm 4
Next
Important Notice
Our weather forecast for Longueuil 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 Longueuil forecast closer to your planned date for the most up-to-date weather information.
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Longueuil in September - FAQ

What are the expected maximum and minimum temperatures in Longueuil 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 Longueuil during September?
Significant rainfall exceeding 221.4 mm is expected in Longueuil during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Longueuil during September?
The average wind speed in Longueuil during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Longueuil

Explore the daily rainfall trends and prepare for Longueuils September weather 💧
Typically, Longueuil has 7 rainy days in September with a total of 221.4 mm of rainfall.

UV exposure in Longueuil 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 Longueuil, located at latitude 45.531 and longitude -73.518. Stay updated with localized weather information tailored for Longueuil.

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