September weather forecast
Hergiswil, Switzerland

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September

Weather in September

The first month of the autumn, September, is still a comfortable month in Hergiswil, Switzerland, with temperature in the range of an average high of 17.5°C (63.5°F) and an average low of 7.5°C (45.5°F).

Temperature

As August transitions into September, Hergiswil sees a gentle drop in the average high-temperature, transitioning from an agreeable 22.1°C (71.8°F) to an enjoyable 17.5°C (63.5°F). Hergiswil records a consistent low-temperature of 7.5°C (45.5°F) during September nights.

Humidity

The average relative humidity in September is 80%.

Rainfall

The month with the least rainfall is September, when the rain falls for 14.3 days and typically collects 52mm (2.05") of precipitation.

Snowfall

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

Daylight

In Hergiswil, the average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 06:46 and sunset at 20:06. On the last day of September, sunrise is at 07:24 and sunset at 19:08 CEST.

Sunshine

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

UV index

In September, the average daily maximum UV index in Hergiswil is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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 Hergiswil?
The high-temperature, in September, in Hergiswil, is 17.5°C (63.5°F), while the low-temperature averages to 7.5°C (45.5°F).
What is the average humidity in September in Hergiswil?
In Hergiswil, Switzerland, the average relative humidity in September is 80%.
What is the driest month in Hergiswil?
September is the month with the least rainfall. Rain falls for 14.3 days and accumulates 52mm (2.05") of precipitation.
How much does it rain in Hergiswil in September?
In Hergiswil, in September, it is raining for 14.3 days, with typically 52mm (2.05") of accumulated precipitation.
When it does not snow in Hergiswil?
June through September are months without snowfall.
Does it snow in Hergiswil in September?
In Hergiswil, in September, it doesn't snow. In October, it regularly snows.
What is the average length of the day in September in Hergiswil?
The average day length in September in Hergiswil is 12h and 34min.
When is the sunrise / sunset in September in Hergiswil?
In September, on the first day of the month, sunrise is at 06:46 and sunset at 20:06. On the last day of the month, in Hergiswil, Switzerland, sunrise is at 07:24 and sunset at 19:08 CEST.
How long on average sun shines in September in Hergiswil?
In September, the average sunshine duration in Hergiswil, Switzerland, is 8.9h.
What is the UV index reading in September in Hergiswil?
In September, the average daily maximum UV index in Hergiswil is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
22.1°C
17.5°C
13.4°C
Average low temperature
10.9°C
7.5°C
4.6°C
Average pressure
1017.8mbar
1018.5mbar
1018.6mbar
Average wind speed
6.2km/h
6.3km/h
6.7km/h
Average max. wind speed
6.7km/h
6.6km/h
7.3km/h
Average wind speed gusts
9.9km/h
10.2km/h
11.5km/h
Average humidity
77%
80%
79%
Average rainfall
115mm
52mm
64mm
Average rainfall days
18.3
14.3
11.2
Average snowfall
0mm
0mm
6mm
Average snowfall days
0
0
0.3
Average daylight
14h 1min
12h 4min
10h 5min
Average sunshine
10h 1min
8h 5min
6h 4min
Average sunshine days
10.1
13
18.4
Average UV index
4
4
3
Average cloud cover
33%
34%
34%
Average visibility
8km
8km
8km
Average temperature in September
Hergiswil, Switzerland
  • Average high temperature in September: 17.5°C

The warmest month (with the highest average high temperature) is August (22.1°C).
The month with the lowest average high temperature is January (2.2°C).

  • Average low temperature in September: 7.5°C

The month with the highest average low temperature is August (10.9°C).
The coldest month (with the lowest average low temperature) is February (-4.9°C).

Average pressure in September
Hergiswil, Switzerland
  • Average pressure in September: 1018.5mbar

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
Hergiswil, Switzerland
  • Average wind speed in September: 6.3km/h

The windiest month (with the highest average wind speed) is December (8.3km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).

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

The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are July and August (77%).

Average rainfall in September
Hergiswil, Switzerland
  • Average rainfall in September: 52mm

The wettest month (with the highest rainfall) is July (121mm).
The driest month (with the least rainfall) is September (52mm).

Average rainfall days in September
Hergiswil, Switzerland
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is May (21.5 days).
The month with the least rainy days is October (11.2 days).

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

The month with the highest snowfall is February (169mm).
The months with the least snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15h and 48min).
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 July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in September
Hergiswil, Switzerland
  • Average sunshine days in September: 13 days

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is June (7.3 days).

Average UV index in September
Hergiswil, 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, March, November and December (UV index 2).

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

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 33).

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

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (8km).
The month with the lowest visibility is January (7km).

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