Saint-Jean-sur-Richelieu
September
Weather in Saint-Jean-sur-Richelieu for September 2025
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 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.
Saint-Jean-sur-Richelieu sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
22°/11°
Temperatures
13 km/h
Avg max wind
82 %
Avg humidity
Saint-Jean-sur-Richelieu in September average weather
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Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
---|---|---|---|---|---|---|
1 24° | 2 20° | 3 23° | 4 27° | 5 27° | 6 26° | 7 25° |
8 19° | 9 19° | 10 18° | 11 22° | 12 23° | 13 22° | 14 20° |
15 22° | 16 23° | 17 25° | 18 23° | 19 21° | 20 21° | 21 21° |
22 21° | 23 20° | 24 21° | 25 18° | 26 18° | 27 19° | 28 21° |
29 19° | 30 22° |
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Temperatures trend during September in Saint-Jean-sur-Richelieu
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. | Mist | 24° /9° | 2.6 mm | 6 | |
2 Sept. | Cloudy | 20° /9° | 0.2 mm | 5 | |
3 Sept. | Cloudy | 23° /10° | 0 mm | 6 | |
4 Sept. | Mist | 27° /14° | 0 mm | 7 | |
5 Sept. | Fog | 27° /16° | 0 mm | 6 | |
6 Sept. | Fog | 26° /17° | 0 mm | 6 | |
7 Sept. | Patchy light rain with thunder | 25° /14° | 5.7 mm | 6 | |
8 Sept. | Light rain shower | 19° /11° | 5.1 mm | 5 | |
9 Sept. | Overcast | 19° /8° | 0 mm | 5 | |
10 Sept. | Light rain shower | 18° /10° | 4.5 mm | 5 | |
11 Sept. | Fog | 22° /10° | 4.7 mm | 6 | |
12 Sept. | Mist | 23° /11° | 0.6 mm | 6 | |
13 Sept. | Moderate or heavy rain shower | 22° /12° | 15.7 mm | 5 | |
14 Sept. | Mist | 20° /12° | 0 mm | 5 | |
15 Sept. | Overcast | 22° /10° | 0 mm | 6 | |
16 Sept. | Overcast | 23° /13° | 0 mm | 6 | |
17 Sept. | Mist | 25° /12° | 0 mm | 6 | |
18 Sept. | Fog | 23° /14° | 0.6 mm | 6 | |
19 Sept. | Heavy rain | 21° /13° | 10.4 mm | 5 | |
20 Sept. | Cloudy | 21° /10° | 0 mm | 5 | |
21 Sept. | Partly cloudy | 21° /9° | 0 mm | 6 | |
22 Sept. | Mist | 21° /9° | 0 mm | 5 | |
23 Sept. | Overcast | 20° /10° | 0 mm | 5 | |
24 Sept. | Mist | 21° /10° | 0 mm | 6 | |
25 Sept. | Sunny | 18° /8° | 18.7 mm | 5 | |
26 Sept. | Sunny | 18° /9° | 99.1 mm | 5 | |
27 Sept. | Overcast | 19° /6° | 0 mm | 4 | |
28 Sept. | Mist | 21° /9° | 0 mm | 5 | |
29 Sept. | Mist | 19° /8° | 0 mm | 5 | |
30 Sept. | Mist | 22° /10° | 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.
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 22° 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?
Moderate rainfall is anticipated in Saint-Jean-sur-Richelieu during September, with a total of 83.7 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
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 13 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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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.
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