Altstätten Weather in September

September in Altstätten averages 19°C (66°F) during the day and 9°C (48°F) at night. Quite a bit of rainfall is typical this month, with around 145 mm (5.7 in) on average. An umbrella is a good idea.

Rainfall in Altstätten in September

Historically, September sees about 13 days of rain, with a monthly average of 145 mm (5.7 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Altstätten in September

Temperatures in Altstätten in September top out at 19°C (66°F) and drop to 9°C (48°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Altstätten in September

The area enjoys a balanced 155 hours of sunlight, ensuring it's neither too overcast nor too sunny.

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

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

Altstätten Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 43%  

Precipitation 145 mm (5.7 in)  

Rainy days 13 days  

Humidity 78% *  

Sunshine 155 hours *  

Percentage Sunshine 44% *  

* Data from: St. Gallen, Switzerland (13 KM, 8 Miles).

What to Wear in Altstätten 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. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Altstätten 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 Altstätten's climate page.

More climate data for Altstätten

Temperature Rainfall Sunshine Humidity

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