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Weather in Bas-Saint-Laurent for September 2025

Your guide to Bas-Saint-Laurent weather in September - trends and predictions
  • In general, the average temperature in Bas-Saint-Laurent at the beginning of September is 19 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.

  • The climate of Bas-Saint-Laurent in September is notably wet, with an average of 12 rainy days.

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Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/10°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Bas-Saint-Laurent in September average weather

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Temperatures trend during September in Bas-Saint-Laurent

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. Sunny
Sunny
20° /9° 2.5 mm 5
2 Sept. Cloudy
Cloudy
17° /9° 0.1 mm 4
3 Sept. Partly cloudy
Partly cloudy
17° /10° 0 mm 5
4 Sept. Mist
Mist
20° /12° 0 mm 5
5 Sept. Fog
Fog
20° /13° 0 mm 6
6 Sept. Fog
Fog
20° /13° 0 mm 6
7 Sept. Fog
Fog
19° /12° 4.4 mm 5
8 Sept. Light rain shower
Light rain shower
17° /11° 3.6 mm 4
9 Sept. Fog
Fog
14° /9° 0.8 mm 4
10 Sept. Overcast
Overcast
13° /9° 0.4 mm 3
11 Sept. Fog
Fog
15° /9° 0.5 mm 4
12 Sept. Fog
Fog
17° /10° 0 mm 5
13 Sept. Moderate rain
Moderate rain
16° /11° 11.4 mm 4
14 Sept. Moderate rain
Moderate rain
15° /9° 5.4 mm 4
15 Sept. Overcast
Overcast
16° /9° 0 mm 4
16 Sept. Moderate rain
Moderate rain
18° /12° 8.3 mm 5
17 Sept. Overcast
Overcast
20° /14° 3.8 mm 5
18 Sept. Light rain shower
Light rain shower
18° /12° 0.6 mm 5
19 Sept. Moderate rain
Moderate rain
15° /11° 12.8 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
15° /9° 2.6 mm 4
21 Sept. Overcast
Overcast
13° /7° 0 mm 3
22 Sept. Overcast
Overcast
15° /6° 0 mm 4
23 Sept. Light rain
Light rain
14° /7° 3.4 mm 4
24 Sept. Overcast
Overcast
14° /7° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
14° /7° 0 mm 3
26 Sept. Mist
Mist
13° /8° 14.4 mm 3
27 Sept. Partly cloudy
Partly cloudy
13° /9° 14.4 mm 4
28 Sept. Cloudy
Cloudy
13° /8° 0 mm 4
29 Sept. Partly cloudy
Partly cloudy
15° /8° 0 mm 4
30 Sept. Mist
Mist
14° /6° 0 mm 4
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Important Notice
Our weather forecast for Bas-Saint-Laurent 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 Bas-Saint-Laurent forecast closer to your planned date for the most up-to-date weather information.

Bas-Saint-Laurent in September - FAQ

What are the expected maximum and minimum temperatures in Bas-Saint-Laurent during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Bas-Saint-Laurent during September?
Significant rainfall exceeding 109.4 mm is expected in Bas-Saint-Laurent during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bas-Saint-Laurent during September?
The average wind speed in Bas-Saint-Laurent during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Bas-Saint-Laurent

Explore the daily rainfall trends and prepare for Bas-Saint-Laurents September weather 💧
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Location coordinates Where is Bas-Saint-Laurent?

Get accurate weather forecasts for Bas-Saint-Laurent, located at latitude 48.449 and longitude -68.524. Stay updated with localized weather information tailored for Bas-Saint-Laurent.

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