Weather in Boulogne-Billancourt in September
Boulogne-Billancourt, France averages a high of 20.9°C (69.6°F) and low of 12.4°C (54.3°F) in September, with 8 rain days and 8.7 hours of daily sunshine. Travel score: 77.8/100 (Good). The best time to visit Boulogne-Billancourt is July.
High
21°C70°F
Low
12°C54°F
🌧️
8
rain days
☀️
8.7
hrs/day sunshine
💧
73%
humidity
78— Good
September in Boulogne-Billancourt is mild and occasionally wet — good for most activities.
What are the average temperatures in Boulogne-Billancourt?
How much does it rain in Boulogne-Billancourt in September?
Boulogne-Billancourt receives an average of 49.3mm of rainfall across 8 rainy days in September. The annual total is 684.6mm.
What should I pack for Boulogne-Billancourt 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 (8 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to France 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