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.

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• January
• February
• March
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• May
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• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Switzerland, check out our Willisau's climate page.

Willisau Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 44%  

Precipitation 135 mm (5.3 in)  

Rainy days 13 days  

Humidity 79% *  

Sunshine 176 hours *  

Percentage Sunshine 49% *  

* Data from: Bern, Switzerland (46 KM, 28 Miles).

What to Wear in Willisau in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Willisau in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

3/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Switzerland, check out our Willisau's climate page.

More climate data for Willisau

Temperature Rainfall Sunshine Humidity

See the full Willisau climate overview or explore weather in Switzerland.