Weather in Ottawa South in September
Ottawa South, Canada averages a high of 20.9°C (69.6°F) and low of 12.3°C (54.1°F) in September, with 9 rain days and 9.1 hours of daily sunshine. Travel score: 76.8/100 (Good). The best time to visit Ottawa South is August.
High
21°C70°F
Low
12°C54°F
🌧️
9
rain days
☀️
9.1
hrs/day sunshine
💧
75%
humidity
77— Good
September in Ottawa South is mild and occasionally wet — good for most activities.
What are the average temperatures in Ottawa South?
How much does it rain in Ottawa South in September?
Ottawa South receives an average of 88.2mm of rainfall across 9 rainy days in September. The annual total is 996.4mm.
What should I pack for Ottawa South in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 21°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (9 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