Weather in Saint-Jean-sur-Richelieu in September
Saint-Jean-sur-Richelieu, Canada averages a high of 20.6°C (69.1°F) and low of 12.4°C (54.3°F) in September, with 10 rain days and 9.1 hours of daily sunshine. Travel score: 75.7/100 (Good). The best time to visit Saint-Jean-sur-Richelieu is August.
High
21°C69°F
Low
12°C54°F
🌧️
10
rain days
☀️
9.1
hrs/day sunshine
💧
76%
humidity
76— Good
September in Saint-Jean-sur-Richelieu is mild and occasionally wet — good for most activities.
What are the average temperatures in Saint-Jean-sur-Richelieu?
How much does it rain in Saint-Jean-sur-Richelieu in September?
Saint-Jean-sur-Richelieu receives an average of 92.5mm of rainfall across 10 rainy days in September. The annual total is 1105.6mm.
What should I pack for Saint-Jean-sur-Richelieu in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 21°C
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Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (10 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to Canada in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31