September weather forecast
Lugano, Switzerland

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Weather in September

September ushers in the fall season, signalling cooler days ahead. Slight lowering in temperature from 24.6°C (76.3°F) to 20.2°C (68.4°F) helps the city transition smoothly from the intense heat of August. The mellow weather complements the changing colors of leaves, adding to Lugano's vibrancy. The chance of rain decreases dramatically, encouraging outdoor activities amidst the splendidly painted backdrop of autumn. With gentle winds rustling through the changing foliage, it offers a delightfully nostalgic experience.

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a warm 24.6°C (76.3°F) in August to an agreeable 20.2°C (68.4°F). Nighttime temperatures consistently average a frosty 9.3°C (48.7°F) during September.

Humidity

In Lugano, Switzerland, the average relative humidity in September is 76%.

Rainfall

In Lugano, in September, it is raining for 8.3 days, with typically 16mm (0.63") of accumulated precipitation. In Lugano, Switzerland, during the entire year, the rain falls for 102.6 days and collects up to 414mm (16.3") of precipitation.

Snowfall

In Lugano, snow does not fall in April through October.

Daylight

In Lugano, the average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 06:45 and sunset at 20:02. On the last day of September, in Lugano, sunrise is at 07:21 and sunset at 19:06 CEST.

Sunshine

In Lugano, the average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 4 during September morphs into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What are September temperatures in Lugano?

The high-temperature in Lugano, Switzerland, during September is 20.2°C (68.4°F) and the low-temperature is 9.3°C (48.7°F).

What is the average humidity in September in Lugano?

In September, the average relative humidity is 76%.

How many days does it rain in September in Lugano?

In September, in Lugano, the rain falls for 8.3 days. Throughout September, 16mm (0.63") of precipitation is accumulated.

When it does not snow in Lugano?

In Lugano, Switzerland, snow does not fall in April through October.

What is the average length of the day in September in Lugano?

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

What time are sunrise and sunset in September in Lugano?

On the first day of September in Lugano, Switzerland, sunrise is at 06:45 and sunset at 20:02. On the last day of the month, sunrise is at 07:21 and sunset at 19:06 CEST.

How long on average sun shines in September in Lugano?

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

How high is the UV index in September in Lugano?

In Lugano, 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 exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lugano, Switzerland

Average temperature in September - Lugano, Switzerland
  • Average high temperature in September: 20.2°C

The warmest month (with the highest average high temperature) is July (25.2°C).
The month with the lowest average high temperature is January (4.5°C).

  • Average low temperature in September: 9.3°C

The months with the highest average low temperature are July and August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).

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Average pressure in September
Lugano, Switzerland

Average pressure in September - Lugano, Switzerland
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is April (1015mbar).

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Average wind speed in September
Lugano, Switzerland

Average wind speed in September - Lugano, Switzerland
  • Average wind speed in September: 7km/h

The windiest month (with the highest average wind speed) is July (7.7km/h).
The calmest month (with the lowest average wind speed) is November (6.1km/h).

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Average humidity in September
Lugano, Switzerland

Average humidity in September - Lugano, Switzerland
  • Average humidity in September: 76%

The month with the highest relative humidity is November (80%).
The months with the lowest relative humidity are January and July (72%).

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Average rainfall in September
Lugano, Switzerland

Average rainfall in September - Lugano, Switzerland
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is November (70mm).
The driest month (with the least rainfall) is January (7mm).

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Average rainfall days in September
Lugano, Switzerland

Average rainfall days in September - Lugano, Switzerland
  • Average rainfall days in September: 8.3 days

The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is December (4.1 days).

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Average snowfall in September
Lugano, Switzerland

Average snowfall in September - Lugano, Switzerland
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Lugano, Switzerland

Average snowfall days in September - Lugano, Switzerland
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Lugano, 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: 9h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).

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Average sunshine days in September
Lugano, Switzerland

Average sunshine days in September - Lugano, Switzerland
  • Average sunshine days in September: 19.6 days

The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is June (16.9 days).

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Average UV index in September
Lugano, Switzerland

Average UV index in September - Lugano, Switzerland
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (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
Lugano, Switzerland

Average cloud cover in September - Lugano, Switzerland
  • Average cloud cover in September: 31

The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 23).

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Average visibility in September
Lugano, Switzerland

Average visibility in September - Lugano, Switzerland
  • Average visibility in September: 9km

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

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Lugano, Switzerland

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