Weather in Interlaken in September
Interlaken, Switzerland averages a high of 19.5°C (67.1°F) and low of 11.2°C (52.2°F) in September, with 14 rain days and 9.4 hours of daily sunshine. Travel score: 67.6/100 (Good). The best time to visit Interlaken is August.
High
20°C67°F
Low
11°C52°F
🌧️
14
rain days
☀️
9.4
hrs/day sunshine
💧
83%
humidity
68— Good
September in Interlaken is mild and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Interlaken?
How much does it rain in Interlaken in September?
Interlaken receives an average of 145mm of rainfall across 14 rainy days in September. The annual total is 1760mm.
What should I pack for Interlaken in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 20°C
Recommended
🧥
Light rain jacket
Some rainy days expected (14 days)
☔
Umbrella
Be prepared for occasional showers
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
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