Altdorf Weather in September

Altdorf in September sees moderate temperatures, with highs around 15°C (59°F) and overnight lows of 5°C (41°F). With the rainy season in full effect, expect around 176 mm (6.9 in) of rainfall and regular showers throughout the month.

Rainfall in Altdorf in September

As part of the rainy season, Altdorf sees around 15 days of rain in September, with an average of 176 mm (6.9 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Altdorf in September

Daytime temperatures in Altdorf reach 15°C (59°F) in September, dropping to 5°C (41°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Altdorf in September

With about 138 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.

Wind Speed in Altdorf in September

Average wind conditions reach 2 m/s (4 knots) in September. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.

If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Altdorf.

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• January
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• May
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• October
• November
• December

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

Altdorf Temperature in September

Min Temperature 5°C (41°F)  

Max Temperature 15°C (59°F)  

Chance of Rain 50%  

Precipitation 176 mm (6.9 in)  

Rainy days 15 days  

Humidity 78%  

Windspeed 2 m/s (4 knots)  

Sunshine 138 hours  

Percentage Sunshine 52%  

What to Wear in Altdorf in September

The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Altdorf 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 Altdorf's climate page.

More climate data for Altdorf

Temperature Rainfall Sunshine Humidity Wind Speed

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