September weather forecast
Grächen, Switzerland

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Weather in September

The first month of the autumn, September, is also a fresh month in Grächen, Switzerland, with an average temperature varying between 2.6°C (36.7°F) and 10.5°C (50.9°F).

Temperature

With the arrival of September, Grächen experiences a modest decline in average high-temperatures, transitioning from a refreshing 14.5°C (58.1°F) in August to a fresh 10.5°C (50.9°F). During the month of September, an average temperature of 2.6°C (36.7°F) is noted during the nights.

Humidity

The average relative humidity in September in Grächen is 84%.

Rainfall

In Grächen, during September, the rain falls for 19.1 days and regularly aggregates up to 95mm (3.74") of precipitation. In Grächen, during the entire year, the rain falls for 176.3 days and collects up to 1541mm (60.67") of precipitation.

Snowfall

January through June, August through December are months with snowfall in Grächen. In Grächen, in September, during 1.8 snowfall days, 55mm (2.17") of snow is typically accumulated. Throughout the year, in Grächen, there are 126.3 snowfall days, and 4942mm (194.57") of snow is accumulated.

Daylight

In Grächen, the average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 06:49 and sunset at 20:07. On the last day of September, sunrise is at 07:26 and sunset at 19:10 CEST.

Sunshine

The average sunshine in September is 7.6h.

UV index

In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 2 in September transforms into the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
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Frequently asked questions

What is the temperature in September in Grächen?

September temperatures vary between a high-temperature of 10.5°C (50.9°F) and a low-temperature of 2.6°C (36.7°F).

What is the average humidity in September in Grächen?

In September, the average relative humidity in Grächen, Switzerland, is 84%.

How much does it rain in Grächen in September?

In Grächen, during September, the rain falls for 19.1 days and regularly aggregates up to 95mm (3.74") of precipitation.

How many days does it snow in September in Grächen?

In Grächen, Switzerland, in September, during 1.8 snowfall days, 55mm (2.17") of snow is typically accumulated.

How many hours of daylight does Grächen have in September?

In September, the average day length in Grächen, Switzerland, is 12h and 32min.

What time are sunrise and sunset in September in Grächen?

On the first day of September in Grächen, Switzerland, sunrise is at 06:49 and sunset at 20:07. On the last day of the month, sunrise is at 07:26 and sunset at 19:10 CEST.

How many hours of sunshine does Grächen have in September?

In Grächen, the average sunshine duration in September is 7.6h.

What is the UV index reading in September in Grächen?

In September, the average daily maximum UV index in Grächen is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Grächen, Switzerland

Average temperature in September - Grächen, Switzerland
  • Average high temperature in September: 10.5°C

The warmest month (with the highest average high temperature) is July (14.8°C).
The month with the lowest average high temperature is January (-3.6°C).

  • Average low temperature in September: 2.6°C

The month with the highest average low temperature is August (5.3°C).
The coldest month (with the lowest average low temperature) is January (-12.3°C).

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Average pressure in September
Grächen, Switzerland

Average pressure in September - Grächen, Switzerland
  • Average pressure in September: 1018mbar

The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.1mbar).

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Average wind speed in September
Grächen, Switzerland

Average wind speed in September - Grächen, Switzerland
  • Average wind speed in September: 6.4km/h

The windiest month (with the highest average wind speed) is December (9.6km/h).
The calmest month (with the lowest average wind speed) is August (5.8km/h).

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Average humidity in September
Grächen, Switzerland

Average humidity in September - Grächen, Switzerland
  • Average humidity in September: 84%

The month with the highest relative humidity is March (91%).
The month with the lowest relative humidity is July (82%).

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Average rainfall in September
Grächen, Switzerland

Average rainfall in September - Grächen, Switzerland
  • Average rainfall in September: 95mm

The wettest month (with the highest rainfall) is July (199mm).
The driest month (with the least rainfall) is January (51mm).

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Average rainfall days in September
Grächen, Switzerland

Average rainfall days in September - Grächen, Switzerland
  • Average rainfall days in September: 19.1 days

The month with the highest number of rainy days is July (26.6 days).
The month with the least rainy days is January (4.1 days).

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Average snowfall in September
Grächen, Switzerland

Average snowfall in September - Grächen, Switzerland
  • Average snowfall in September: 55mm

The month with the highest snowfall is November (1182mm).
The month with the least snowfall is July (0mm).

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Average snowfall days in September
Grächen, Switzerland

Average snowfall days in September - Grächen, Switzerland
  • Average snowfall days in September: 1.8 days

The month with the highest number of snowfall days is March (21.7 days).
The months with the least snowfall days are July and August (0.1 days).

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Average daylight in September /
Average sunshine in September
Grächen, Switzerland

Average daylight in September / Average sunshine in September - Grächen, Switzerland
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in September: 7h and 4min

The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).

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Average sunshine days in September
Grächen, Switzerland

Average sunshine days in September - Grächen, Switzerland
  • Average sunshine days in September: 8.3 days

The month with the most sunshine days is December (15.1 days).
The month with the least sunshine days is August (3.3 days).

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Average UV index in September
Grächen, Switzerland

Average UV index in September - Grächen, Switzerland
  • Average UV index in September: 2

The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are January, February, March and April (UV index 1).

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Average cloud cover in September
Grächen, Switzerland

Average cloud cover in September - Grächen, Switzerland
  • Average cloud cover in September: 49

The month with the most cloud cover is April (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 45).

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Average visibility in September
Grächen, Switzerland

Average visibility in September - Grächen, Switzerland
  • Average visibility in September: 7km

The months with the highest visibility are June, July, August and December (8km).
The months with the lowest visibility are March, April and November (6km).

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Grächen, Switzerland

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