Alt Sankt Johann Weather in September

Alt Sankt Johann in September sees moderate temperatures, with highs around 17°C (63°F) and overnight lows of 8°C (46°F). With the rainy season in full effect, expect around 185 mm (7.3 in) of rainfall and regular showers throughout the month.

Rainfall in Alt Sankt Johann in September

As part of the rainy season, Alt Sankt Johann sees around 14 days of rain in September, with an average of 185 mm (7.3 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.

Temperature in Alt Sankt Johann in September

Daytime temperatures in Alt Sankt Johann reach 17°C (63°F) in September, dropping to 8°C (46°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Alt Sankt Johann in September

The city usually sees around 157 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).

Wind Speed in Alt Sankt Johann in September

Average wind conditions reach 6 m/s (12 knots) in September. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July typically offers the best weather for Alt Sankt Johann.

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

Alt Sankt Johann Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 46%  

Precipitation 185 mm (7.3 in)  

Rainy days 14 days  

Humidity 78% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 157 hours *  

Percentage Sunshine *  

* Data from: Säntis (the highest mountain in the Alpstein massif), Switzerland (5 KM, 3 Miles).

What to Wear in Alt Sankt Johann 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 Alt Sankt Johann in September

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

Swimming

6/10

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 Alt Sankt Johann's climate page.

More climate data for Alt Sankt Johann

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Alt Sankt Johann climate overview or explore weather in Switzerland.