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Weather in Trois-Rivières for September 2025

Your guide to Trois-Rivières weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Trois-Rivières at the beginning of September is 24.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.3 °C by the end of September.

    • Rain 🌧️

  • Trois-Rivières experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 127.3 mm.

    • More

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Trois-Rivières Weather September

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

Temperatures trend during September in Trois-Rivières

See the weather trend as well as the moving average line

September weather in Trois-Rivières day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 23° /9° 2.6 mm 6
2 Sept. Mist
Mist
 19° /9° 0.1 mm 5
3 Sept. Fog
Fog
 24° /11° 0 mm 6
4 Sept. Fog
Fog
 26° /14° 0 mm 6
5 Sept. Fog
Fog
 26° /15° 0 mm 6
6 Sept. Fog
Fog
 27° /15° 0.3 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 24° /14° 9.3 mm 6
8 Sept. Light rain shower
Light rain shower
 19° /12° 7.7 mm 5
9 Sept. Mist
Mist
 20° /9° 0 mm 5
10 Sept. Mist
Mist
 20° /9° 0 mm 5
11 Sept. Mist
Mist
 21° /10° 0 mm 6
12 Sept. Overcast
Overcast
 21° /11° 0.1 mm 5
13 Sept. Heavy rain
Heavy rain
 22° /12° 13 mm 5
14 Sept. Fog
Fog
 19° /11° 0 mm 5
15 Sept. Partly cloudy
Partly cloudy
 22° /9° 0 mm 6
16 Sept. Overcast
Overcast
 23° /13° 0 mm 6
17 Sept. Light rain shower
Light rain shower
 24° /12° 0.4 mm 6
18 Sept. Light rain shower
Light rain shower
 23° /12° 1.8 mm 5
19 Sept. Moderate rain
Moderate rain
 22° /13° 4.5 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 20° /12° 0.1 mm 5
21 Sept. Sunny
Sunny
 21° /9° 0 mm 6
22 Sept. Mist
Mist
 21° /8° 0 mm 5
23 Sept. Mist
Mist
 20° /8° 0 mm 5
24 Sept. Sunny
Sunny
 20° /10° 0 mm 5
25 Sept. Sunny
Sunny
 16° /8° 9.9 mm 4
26 Sept. Sunny
Sunny
 17° /8° 77.6 mm 4
27 Sept. Sunny
Sunny
 20° /9° 0 mm 5
28 Sept. Mist
Mist
 21° /8° 0 mm 5
29 Sept. Mist
Mist
 20° /8° 0 mm 5
30 Sept. Mist
Mist
 21° /7° 0 mm 5
Next
Important Notice
Our weather forecast for Trois-Rivières 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 Trois-Rivières forecast closer to your planned date for the most up-to-date weather information.
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Trois-Rivières in September - FAQ

What are the expected maximum and minimum temperatures in Trois-Rivières during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Trois-Rivières during September?
Significant rainfall exceeding 127.3 mm is expected in Trois-Rivières during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Trois-Rivières during September?
The average wind speed in Trois-Rivières during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Trois-Rivières

Explore the daily rainfall trends and prepare for Trois-Rivièress September weather 💧

UV exposure in Trois-Rivières during September

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

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Location coordinates Where is Trois-Rivières?

Get accurate weather forecasts for Trois-Rivières, located at latitude 46.345 and longitude -72.548. Stay updated with localized weather information tailored for Trois-Rivières.

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