Sarnen Weather in September

During September, Sarnen experiences moderate daytime temperatures of 16°C (61°F) and cooler nights around 8°C (46°F). September sits within the rainy season, so expect regular and often heavy rainfall.

Rainfall in Sarnen in September

Sarnen is in the rainy season in September, with rain on around 14 days and an average of 178 mm (7 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Sarnen in September

Daytime temperatures in Sarnen reach 16°C (61°F) in September, dropping to 8°C (46°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Sarnen in September

You can expect a moderate amount of sunlight, with approximately 138 hours. Even though this month is part of the wet season, you can still see the sun occasionally.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July, August and September typically offer the best weather for Sarnen.

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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 Sarnen's climate page.

Sarnen Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 16°C (61°F)  

Chance of Rain 47%  

Precipitation 178 mm (7 in)  

Rainy days 14 days  

Humidity 78% *  

Sunshine 138 hours *  

Percentage Sunshine 52% *  

* Data from: Altdorf, Switzerland (29 KM, 18 Miles).

What to Wear in Sarnen 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. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Sarnen in September

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

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

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 Sarnen's climate page.

More climate data for Sarnen

Temperature Rainfall Sunshine Humidity

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