Alt Sankt Johann
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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.

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).

Alt Sankt Johann Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Alt Sankt Johann - and find the best time to visit.

Best Places in Switzerland in September

Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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

Alt Sankt Johann 3-Day Forecast

More climate data for Alt Sankt Johann

Popular in September

Where to go in September - average daytime high across popular destinations.

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