Trois-Rivières
September
Weather in Trois-Rivières for September 2025
Your guide to Trois-Rivières weather in September - trends and predictions
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.
Trois-Rivières experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 127.3 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
21°/11°
Temperatures
15 km/h
Avg max wind
79 %
Avg humidity
Trois-Rivières in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  19° | 3 24° | 4 26° | 5 26° | 6 27° | 7  24° |
| 8  19° | 9 20° | 10 20° | 11 21° | 12  21° | 13  22° | 14 19° |
| 15 22° | 16 23° | 17 24° | 18 23° | 19  22° | 20 20° | 21  21° |
| 22 21° | 23 20° | 24 20° | 25 16° | 26 17° | 27 20° | 28 21° |
| 29 20° | 30 21° |
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Temperatures trend during September in Trois-Rivières
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. | Partly cloudy | 23° /9° | 2.6 mm | 6 | |
| 2 Sept. | Mist | 19° /9° | 0.1 mm | 5 | |
| 3 Sept. | Fog | 24° /11° | 0 mm | 6 | |
| 4 Sept. | Fog | 26° /14° | 0 mm | 6 | |
| 5 Sept. | Fog | 26° /15° | 0 mm | 6 | |
| 6 Sept. | Fog | 27° /15° | 0.3 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 24° /14° | 9.3 mm | 6 | |
| 8 Sept. | Light rain shower | 19° /12° | 7.7 mm | 5 | |
| 9 Sept. | Mist | 20° /9° | 0 mm | 5 | |
| 10 Sept. | Mist | 20° /9° | 0 mm | 5 | |
| 11 Sept. | Mist | 21° /10° | 0 mm | 6 | |
| 12 Sept. | Overcast | 21° /11° | 0.1 mm | 5 | |
| 13 Sept. | Heavy rain | 22° /12° | 13 mm | 5 | |
| 14 Sept. | Fog | 19° /11° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 22° /9° | 0 mm | 6 | |
| 16 Sept. | Overcast | 23° /13° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 24° /12° | 0.4 mm | 6 | |
| 18 Sept. | Light rain shower | 23° /12° | 1.8 mm | 5 | |
| 19 Sept. | Moderate rain | 22° /13° | 4.5 mm | 5 | |
| 20 Sept. | Patchy rain possible | 20° /12° | 0.1 mm | 5 | |
| 21 Sept. | Sunny | 21° /9° | 0 mm | 6 | |
| 22 Sept. | Mist | 21° /8° | 0 mm | 5 | |
| 23 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 24 Sept. | Sunny | 20° /10° | 0 mm | 5 | |
| 25 Sept. | Sunny | 16° /8° | 9.9 mm | 4 | |
| 26 Sept. | Sunny | 17° /8° | 77.6 mm | 4 | |
| 27 Sept. | Sunny | 20° /9° | 0 mm | 5 | |
| 28 Sept. | Mist | 21° /8° | 0 mm | 5 | |
| 29 Sept. | Mist | 20° /8° | 0 mm | 5 | |
| 30 Sept. | Mist | 21° /7° | 0 mm | 5 | |
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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.
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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