Willisau Weather in September

September in Willisau sees daytime temperatures around 19°C (66°F) and lows of 10°C (50°F) at night. With around 135 mm (5.3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Willisau in September

This month experiences about 13 days of rain according to historical data, averaging 135 mm (5.3 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Willisau in September

September in Willisau sees highs of 19°C (66°F) and lows of 10°C (50°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Willisau in September

The area enjoys a moderate level of sunlight, with around 176 hours. It's a good balance between sunny and cloudy days.

If you prefer enjoying temperate temperatures and rain-free days, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.