September weather forecast
Saint Gallen, Switzerland

The Abbey Cathedral of Saint Gall in Saint Gallen, Switzerland
The Abbey Cathedral of Saint Gall in Saint Gallen, Switzerland

Weather in September

The first month of the autumn, September, is also an enjoyable month in Saint Gallen, Switzerland, with an average temperature fluctuating between 18.6°C (65.5°F) and 8.6°C (47.5°F).

Temperature

In Saint Gallen, the average high-temperature in September slightly decreases from a warm 23°C (73.4°F) in August to an enjoyable 18.6°C (65.5°F). In Saint Gallen, the average low-temperature is 8.6°C (47.5°F).

Humidity

The average relative humidity in September is 78%.

Rainfall

In September, in Saint Gallen, Switzerland, the rain falls for 14.3 days. Throughout September, 57mm (2.24") of precipitation is accumulated. Throughout the year, in Saint Gallen, Switzerland, there are 177.8 rainfall days, and 1006mm (39.61") of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Saint Gallen, the average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 06:41 and sunset at 20:03. On the last day of September, in Saint Gallen, sunrise is at 07:20 and sunset at 19:04 CEST.

Sunshine

In Saint Gallen, the average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September in Saint Gallen is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Saint Gallen?

In Saint Gallen, the average relative humidity in September is 78%.

How much does it rain in Saint Gallen in September?

In Saint Gallen, Switzerland, during September, the rain falls for 14.3 days and regularly aggregates up to 57mm (2.24") of precipitation.

When it does not snow in Saint Gallen?

In Saint Gallen, Switzerland, snow does not fall in June through September.

Does it snow in Saint Gallen in September?

In Saint Gallen, Switzerland, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Saint Gallen?

In Saint Gallen, the average day length in September is 12h and 34min.

When is the sunrise / sunset in September in Saint Gallen?

In September, on the first day of the month, sunrise is at 06:41 and sunset at 20:03. On the last day of the month, sunrise is at 07:20 and sunset at 19:04 CEST.

How many hours of sunshine does Saint Gallen have in September?

In September, the average sunshine duration in Saint Gallen, Switzerland, is 9.2h.

What is the UV index intensity in September in Saint Gallen?

In Saint Gallen, Switzerland, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Saint Gallen, Switzerland

Average temperature in September - Saint Gallen, Switzerland
  • Average high temperature in September: 18.6°C

The warmest month (with the highest average high temperature) is July (23.1°C).
The month with the lowest average high temperature is January (2.9°C).

  • Average low temperature in September: 8.6°C

The months with the highest average low temperature are July and August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).

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Average pressure in September
Saint Gallen, Switzerland

Average pressure in September - Saint Gallen, Switzerland
  • Average pressure in September: 1018.6mbar

The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).

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Average wind speed in September
Saint Gallen, Switzerland

Average wind speed in September - Saint Gallen, Switzerland
  • Average wind speed in September: 6.9km/h

The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).

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Average humidity in September
Saint Gallen, Switzerland

Average humidity in September - Saint Gallen, Switzerland
  • Average humidity in September: 78%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (75%).

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Average rainfall in September
Saint Gallen, Switzerland

Average rainfall in September - Saint Gallen, Switzerland
  • Average rainfall in September: 57mm

The wettest month (with the highest rainfall) is August (126mm).
The driest month (with the least rainfall) is April (52mm).

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Average rainfall days in September
Saint Gallen, Switzerland

Average rainfall days in September - Saint Gallen, Switzerland
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in September
Saint Gallen, Switzerland

Average snowfall in September - Saint Gallen, Switzerland
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (353mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Saint Gallen, Switzerland

Average snowfall days in September - Saint Gallen, Switzerland
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (12.6 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Saint Gallen, Switzerland

Average daylight in September / Average sunshine in September - Saint Gallen, Switzerland
  • Average daylight in September: 12h and 34min

The month with the longest days is June (Average daylight: 15h and 53min).
The month with the shortest days is December (Average daylight: 8h and 32min).

  • Average sunshine in September: 9h and 12min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Saint Gallen, Switzerland

Average sunshine days in September - Saint Gallen, Switzerland
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is July (6.6 days).

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Average UV index in September
Saint Gallen, Switzerland

Average UV index in September - Saint Gallen, Switzerland
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Saint Gallen, Switzerland

Average cloud cover in September - Saint Gallen, Switzerland
  • Average cloud cover in September: 34

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Saint Gallen, Switzerland

Average visibility in September - Saint Gallen, Switzerland
  • Average visibility in September: 8km

The months with the highest visibility are April, May, June, July, August, October and November (9km).
The months with the lowest visibility are January, February, March, September and December (8km).

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