Weather in London in September
London, Canada averages a high of 21.7°C (71.1°F) and low of 13.3°C (55.9°F) in September, with 9 rain days and 9.9 hours of daily sunshine. Travel score: 79.7/100 (Good). The best time to visit London is August.
High
22°C71°F
Low
13°C56°F
🌧️
9
rain days
☀️
9.9
hrs/day sunshine
💧
74%
humidity
80— Good
September in London is mild and occasionally wet — good for most activities.
What are the average temperatures in London?
How much does it rain in London in September?
London receives an average of 78.7mm of rainfall across 9 rainy days in September. The annual total is 957.5mm.
What should I pack for London in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 22°C
🧴
Sunscreen SPF 30+
10 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