September weather forecast
Dornach, Switzerland

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September

Weather in September

The first month of the autumn, September, is still a comfortable month in Dornach, Switzerland, with an average temperature fluctuating between 9.4°C (48.9°F) and 19.7°C (67.5°F).

Temperature

September implies a soft temperature shift, with average high-temperatures reducing from August's moderately hot 24.1°C (75.4°F) to a comfortable 19.7°C (67.5°F). Dornach observes an average low-temperature of 9.4°C (48.9°F) during September.

Humidity

In Dornach, Switzerland, the average relative humidity in September is 80%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 33mm (1.3") of precipitation.

Snowfall

In Dornach, Switzerland, snow does not fall in April through September.

Daylight

In Dornach, the average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 06:49 and sunset at 20:09. On the last day of September, sunrise is at 07:27 and sunset at 19:10 CEST.

Sunshine

In September, the average sunshine in Dornach is 8.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 4 in September translates into this advice:
Take necessary precautions - Defending against sun damage is advocated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Feb 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Dornach?
In Dornach, in September, the average high-temperature is 19.7°C (67.5°F), and the average low-temperature is 9.4°C (48.9°F).
What is the average humidity in September in Dornach?
The average relative humidity in September is 80%.
What is the driest month in Dornach?
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 33mm (1.3") of precipitation.
How much does it rain in Dornach in September?
In Dornach, Switzerland, in September, it is raining for 12.5 days, with typically 33mm (1.3") of accumulated precipitation.
When it does not snow in Dornach?
April through September are months without snowfall in Dornach.
Does it snow in Dornach in September?
In Dornach, in September, it doesn't snow. In October, it regularly snows.
What is the average length of the day in September in Dornach?
In September, the average day length is 12h and 34min.
When is the sunrise / sunset in September in Dornach?
On the first day of September in Dornach, sunrise is at 06:49 and sunset at 20:09. On the last day of the month, sunrise is at 07:27 and sunset at 19:10 CEST.
How many hours of sunshine does Dornach have in September?
The average sunshine duration in September in Dornach is 8.7h.
What is the UV index reading in September in Dornach?
In Dornach, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
24.1°C
19.7°C
14.8°C
Average low temperature
13.3°C
9.4°C
6°C
Average pressure
1017.6mbar
1018.6mbar
1018.5mbar
Average wind speed
6.7km/h
7.1km/h
7.3km/h
Average max. wind speed
7.4km/h
7.6km/h
8km/h
Average wind speed gusts
10.5km/h
11.4km/h
12km/h
Average humidity
77%
80%
82%
Average rainfall
74mm
33mm
46mm
Average rainfall days
15.9
12.5
11.5
Average snowfall
0mm
0mm
4mm
Average snowfall days
0
0
0.2
Average daylight
14h 1min
12h 4min
10h 5min
Average sunshine
10h 1min
8h 4min
6h 2min
Average sunshine days
11.8
14.8
16.8
Average UV index
4
4
3
Average cloud cover
32%
35%
40%
Average visibility
9km
8km
8km
Average temperature in September
Dornach, Switzerland
  • Average high temperature in September: 19.7°C

The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (3.5°C).

  • Average low temperature in September: 9.4°C

The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-1.8°C).

Average pressure in September
Dornach, Switzerland
  • Average pressure in September: 1018.6mbar

The month with the highest atmospheric pressure is December (1020.7mbar).
The months with the lowest atmospheric pressure are April and November (1015.7mbar).

Average wind speed in September
Dornach, Switzerland
  • Average wind speed in September: 7.1km/h

The windiest months (with the highest average wind speed) are February and March (9.9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).

Average humidity in September
Dornach, Switzerland
  • Average humidity in September: 80%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in September
Dornach, Switzerland
  • Average rainfall in September: 33mm

The wettest month (with the highest rainfall) is June (84mm).
The driest month (with the least rainfall) is September (33mm).

Average rainfall days in September
Dornach, Switzerland
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is October (11.5 days).

Average snowfall in September
Dornach, Switzerland
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (61mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).

Average snowfall days in September
Dornach, Switzerland
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Dornach, Switzerland
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

Average sunshine days in September
Dornach, Switzerland
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is October (16.8 days).
The months with the least sunshine days are May and June (8.3 days).

Average UV index in September
Dornach, 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).

Average cloud cover in September
Dornach, Switzerland
  • Average cloud cover in September: 35

The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in September
Dornach, Switzerland
  • Average visibility in September: 8km

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

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