Weather in Basel in September
Basel, Switzerland averages a high of 20.2°C (68.4°F) and low of 10.9°C (51.6°F) in September, with 12 rain days and 9 hours of daily sunshine. Travel score: 71.5/100 (Good). The best time to visit Basel is July.
High
20°C68°F
Low
11°C52°F
🌧️
12
rain days
☀️
9
hrs/day sunshine
💧
77%
humidity
72— Good
September in Basel is mild and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Basel?
How much does it rain in Basel in September?
Basel receives an average of 89.1mm of rainfall across 12 rainy days in September. The annual total is 1142.7mm.
What should I pack for Basel in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 20°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (12 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to Switzerland 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