Climate almanac
Willisau
Lucerne, Switzerland · 47.12°, 7.99°
What is the weather like in Willisau in September?
In September, Willisau is typically 65°F (19°C) during the day and 50°F (10°C) at night. The month brings about 5.0 in (126 mm) of precipitation in total. Snowfall averages about 0.2 in (4 mm) over the month.
- Average high65°F (19°C)
- Average low50°F (10°C)
- Precipitation5.0 in (126 mm)
- Clear or mostly clear days8
- Snowfall0.2 in (4 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)