Weather in Saint-Jean-sur-Richelieu for September 2026
So far, September 2026 in Saint-Jean-sur-Richelieu is slightly warmer than the historical average by 1.2 °C.
The forecast for the next days in Saint-Jean-sur-Richelieu predicts a temperature of 18.2 °C, which is cooler than the historical average.
In general, the average temperature in Saint-Jean-sur-Richelieu at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °C by the end of September.
The climate of Saint-Jean-sur-Richelieu in September is notably wet, with an average of 13 rainy days, and a total of 178.5 mm of precipitation.
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Saint-Jean-sur-Richelieu Weather September
Temperatures trend during September in Saint-Jean-sur-Richelieu
September weather in Saint-Jean-sur-Richelieu day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 25° /10° | 1.3 mm | 6 | |
| 2 Sept. |  Cloudy | 23° /12° | 13.4 mm | 5 | |
| 3 Sept. | Cloudy | 25° /13° | 47.6 mm | 5 | |
| 4 Sept. |  Sunny | 26° /14° | 5.2 mm | 7 | |
| 5 Sept. | Fog | 25° /14° | 12.7 mm | 5 | |
| 6 Sept. | Fog | 24° /14° | 12.1 mm | 6 | |
| 7 Sept. |  Light rain shower | 24° /12° | 4.2 mm | 6 | |
| 8 Sept. | Light rain shower | 20° /11° | 10.9 mm | 4 | |
| 9 Sept. | Sunny | 20° /8° | 4.5 mm | 4 | |
| 10 Sept. | Light rain shower | 21° /10° | 14.8 mm | 6 | |
| 11 Sept. | Sunny | 21° /10° | 2.3 mm | 6 | |
| 12 Sept. | Sunny | 27° /8° | 0 mm | 5.8 | |
| 13 Sept. | Patchy rain possible | 22° /15° | 3.6 mm | 3.9 | |
| 14 Sept. | Sunny | 17° /10° | 0 mm | 4.7 | |
| 15 Sept. |  Overcast | 19° /7° | 0 mm | 5 | |
| 16 Sept. | Overcast | 22° /16° | 0.1 mm | 4.8 | |
| 17 Sept. | Overcast | 16° /12° | 2.4 mm | 3 | |
| 18 Sept. |  Partly cloudy | 20° /12° | 0 mm | 6 | |
| 19 Sept. | Overcast | 20° /11° | 0 mm | 4 | |
| 20 Sept. | Patchy rain possible | 15° /7° | 0 mm | 4 | |
| 21 Sept. | Sunny | 13° /2° | 0 mm | 4 | |
| 22 Sept. | Overcast | 18° /5° | 0 mm | 4 | |
| 23 Sept. | Sunny | 17° /10° | 2.6 mm | 5 | |
| 24 Sept. | Patchy rain possible | 16° /7° | 3.1 mm | 4 | |
| 25 Sept. | Sunny | 13° /4° | 0 mm | 4 | |
| 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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Saint-Jean-sur-Richelieu in September - FAQ
What are the expected maximum and minimum temperatures in Saint-Jean-sur-Richelieu during September?
How much rainfall should be expected in Saint-Jean-sur-Richelieu during September?
What are the typical wind conditions in Saint-Jean-sur-Richelieu during September?
September rainfall patterns in Saint-Jean-sur-Richelieu
UV exposure in Saint-Jean-sur-Richelieu during September
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Where is Saint-Jean-sur-Richelieu?Get accurate weather forecasts for Saint-Jean-sur-Richelieu, located at latitude 45.307 and longitude -73.263. Stay updated with localized weather information tailored for Saint-Jean-sur-Richelieu.