Saint-Jean-sur-Richelieu
September
Weather in Saint-Jean-sur-Richelieu for September 2026
Your guide to Saint-Jean-sur-Richelieu weather in September - trends and predictions
In general, the average temperature in Saint-Jean-sur-Richelieu at the beginning of September is 24.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.
Saint-Jean-sur-Richelieu experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 167.7 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
21°/11°
Temperatures
15 km/h
Avg max wind
80 %
Avg humidity
Saint-Jean-sur-Richelieu Weather September
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Temperatures trend during September in Saint-Jean-sur-Richelieu
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September weather in Saint-Jean-sur-Richelieu day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 24° /10° | 1.7 mm | 6 | |
| 2 Sept. |  Cloudy | 22° /11° | 0.1 mm | 5 | |
| 3 Sept. | Cloudy | 24° /12° | 0 mm | 6 | |
| 4 Sept. | Mist | 26° /13° | 5 mm | 7 | |
| 5 Sept. | Fog | 26° /14° | 15.7 mm | 6 | |
| 6 Sept. | Fog | 24° /15° | 16.1 mm | 5 | |
| 7 Sept. |  Light rain shower | 23° /13° | 5.7 mm | 5 | |
| 8 Sept. | Light rain shower | 20° /10° | 3.4 mm | 5 | |
| 9 Sept. |  Sunny | 20° /7° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 21° /9° | 3 mm | 6 | |
| 11 Sept. | Fog | 22° /10° | 3.1 mm | 5 | |
| 12 Sept. | Mist | 22° /9° | 0.4 mm | 5 | |
| 13 Sept. |  Moderate or heavy rain shower | 20° /11° | 10.5 mm | 5 | |
| 14 Sept. | Mist | 21° /12° | 0.7 mm | 5 | |
| 15 Sept. |  Overcast | 23° /11° | 0 mm | 5 | |
| 16 Sept. | Overcast | 24° /11° | 0 mm | 6 | |
| 17 Sept. | Mist | 26° /11° | 0 mm | 6 | |
| 18 Sept. | Fog | 25° /13° | 0.4 mm | 6 | |
| 19 Sept. |  Heavy rain | 20° /11° | 6.9 mm | 5 | |
| 20 Sept. | Cloudy | 19° /7° | 0 mm | 5 | |
| 21 Sept. |  Partly cloudy | 21° /7° | 0 mm | 6 | |
| 22 Sept. | Mist | 20° /8° | 0.6 mm | 5 | |
| 23 Sept. | Overcast | 20° /11° | 8.7 mm | 5 | |
| 24 Sept. | Mist | 21° /11° | 0 mm | 5 | |
| 25 Sept. | Moderate or heavy rain shower | 19° /10° | 30.6 mm | 5 | |
| 26 Sept. | Sunny | 20° /10° | 66.1 mm | 5 | |
| 27 Sept. | Mist | 19° /5° | 0 mm | 4 | |
| 28 Sept. | Mist | 22° /10° | 0 mm | 5 | |
| 29 Sept. | Mist | 21° /8° | 0 mm | 5 | |
| 30 Sept. | Mist | 21° /9° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Saint-Jean-sur-Richelieu 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 Saint-Jean-sur-Richelieu forecast closer to your planned date for the most up-to-date weather information.
Change Month
Saint-Jean-sur-Richelieu in September - FAQ
What are the expected maximum and minimum temperatures in Saint-Jean-sur-Richelieu 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 Saint-Jean-sur-Richelieu during September?
Significant rainfall exceeding 167.7 mm is expected in Saint-Jean-sur-Richelieu during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint-Jean-sur-Richelieu during September?
The average wind speed in Saint-Jean-sur-Richelieu during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint-Jean-sur-Richelieu
Explore the daily rainfall trends and prepare for Saint-Jean-sur-Richelieus September weather 💧
UV exposure in Saint-Jean-sur-Richelieu during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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