September weather forecast
Aarwangen, Switzerland

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September

Weather in September

September, the first month of the autumn in Aarwangen, is still a refreshing month, with an average temperature ranging between max 18.8°C (65.8°F) and min 8.2°C (46.8°F).

Temperature

The arrival of September signals a subtle shift in temperature, down from a moderately hot 23.3°C (73.9°F) in August to a comfortable 18.8°C (65.8°F). Aarwangen's nighttime temperature in September drops to an average of 8.2°C (46.8°F).

Humidity

The average relative humidity in September in Aarwangen, Switzerland, is 81%.

Rainfall

September is the month with the least rainfall in Aarwangen. Rain falls for 14.5 days and accumulates 45mm (1.77") of precipitation.

Snowfall

In Aarwangen, snow does not fall in June through September.

Daylight

The average length of the day in September in Aarwangen is 12h and 34min.
On the first day of September, sunrise is at 06:48 and sunset at 20:08. On the last day of the month, sunrise is at 07:27 and sunset at 19:10 CEST.

Sunshine

In Aarwangen, the average sunshine in September is 8.9h.

UV index

In Aarwangen, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 4 during September leads to these instructions:
Take precautions - Protection against sun damage is advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. 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.
Updated: Feb 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Aarwangen in September?
In September, in Aarwangen, the average high-temperature is 18.8°C (65.8°F), and the average low-temperature is 8.2°C (46.8°F).
What is the average humidity in September in Aarwangen?
In Aarwangen, the average relative humidity in September is 81%.
What is the driest month in Aarwangen?
September is the month with the least rainfall in Aarwangen, Switzerland. Rain falls for 14.5 days and accumulates 45mm (1.77") of precipitation.
How many days does it rain in September in Aarwangen?
In Aarwangen, Switzerland, in September, during 14.5 rainfall days, 45mm (1.77") of precipitation is typically accumulated.
When it does not snow in Aarwangen?
June through September are months without snowfall in Aarwangen.
Does it snow in Aarwangen in September?
In Aarwangen, in September, it doesn't snow. In October, it regularly snows.
What is the average length of the day in September in Aarwangen?
In September, the average day length is 12h and 34min.
When is the sunrise / sunset in September in Aarwangen?
On the first day of September in Aarwangen, sunrise is at 06:48 and sunset at 20:08. On the last day of the month, sunrise is at 07:27 and sunset at 19:10 CEST.
How long on average sun shines in September in Aarwangen?
In Aarwangen, the average sunshine duration in September is 8.9h.
What is the UV index reading in September in Aarwangen?
The average daily maximum UV index in September in Aarwangen, Switzerland, is 4. A UV Index estimate 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
23.3°C
18.8°C
13.9°C
Average low temperature
11.8°C
8.2°C
4.5°C
Average pressure
1017.7mbar
1018.6mbar
1018.5mbar
Average wind speed
5.9km/h
6.4km/h
6.5km/h
Average max. wind speed
6.7km/h
6.9km/h
7.1km/h
Average wind speed gusts
9.5km/h
10.5km/h
11km/h
Average humidity
79%
81%
83%
Average rainfall
95mm
45mm
61mm
Average rainfall days
18.3
14.5
13.2
Average snowfall
0mm
0mm
9mm
Average snowfall days
0
0
0.4
Average daylight
14h 1min
12h 4min
10h 5min
Average sunshine
10h 2min
8h 5min
6h 2min
Average sunshine days
9.6
12.2
15
Average UV index
4
4
2
Average cloud cover
32%
34%
39%
Average visibility
9km
8km
8km
Average temperature in September
Aarwangen, Switzerland
  • Average high temperature in September: 18.8°C

The warmest months (with the highest average high temperature) are July and August (23.3°C).
The month with the lowest average high temperature is January (2.9°C).

  • Average low temperature in September: 8.2°C

The months with the highest average low temperature are July and August (11.8°C).
The coldest month (with the lowest average low temperature) is February (-3.4°C).

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

The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).

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

The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).

Average humidity in September
Aarwangen, Switzerland
  • Average humidity in September: 81%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and July (78%).

Average rainfall in September
Aarwangen, Switzerland
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is May (106mm).
The driest month (with the least rainfall) is September (45mm).

Average rainfall days in September
Aarwangen, Switzerland
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is May (22.4 days).
The month with the least rainy days is February (10.6 days).

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

The month with the highest snowfall is February (153mm).
The months with the least snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Aarwangen, 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 36min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in September
Aarwangen, Switzerland
  • Average sunshine days in September: 12.2 days

The month with the most sunshine days is October (15 days).
The month with the least sunshine days is May (6.6 days).

Average UV index in September
Aarwangen, 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, October, November and December (UV index 2).

Average cloud cover in September
Aarwangen, Switzerland
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).

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

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

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