September weather - Autumn 2024 - Lucerne, Switzerland

Weather in September
Frequently asked questions
Average temperature in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall in September
Average snowfall days in September
Average daylight in September
Average sunshine in September
Average UV index in September

The city of Lucerne, Switzerland, with the river between and the distant scenic mountains

Weather in September

The arrival of September in Lucerne announces the gradual retreat of summer. Rainfall reduces to 107mm (4.21"), it comes over 10.2 days, signaling a shift in seasons. The city begins its preparation for the approaching autumn, as leaves start to turn. Daylight hours start to diminish, foreshadowing the forthcoming shorter days. Despite the imminent season change, outdoor activities continue to be pursued avidly, enhanced by a pleasing mix of comfortable temperatures and diminishing rain.

Temperature

Lucerne's transition into September involves a gentle shift in temperature, receding from a warm 23.8°C (74.8°F) in August to a comfortable 19.4°C (66.9°F). The average nighttime temperature in Lucerne lowers to a cool 10.6°C (51.1°F) throughout September.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In September, in Lucerne, the rain falls for 10.2 days. Throughout September, 107mm (4.21") of precipitation is accumulated. In Lucerne, during the entire year, the rain falls for 132.2 days and collects up to 1174mm (46.22") of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September in Lucerne 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, in Lucerne, Switzerland, sunrise is at 07:24 and sunset at 19:08 CEST.

Sunshine

In September, the average sunshine in Lucerne is 4.6h.

UV index

The average daily maximum UV index in September in Lucerne is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum high daily UV index of 5 during September translates into the following directions:
Put precautions into practice - Protective measures against sun-induced damage are advised. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

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Frequently asked questions

What are September temperatures in Lucerne?

Lucerne in September has an average high-temperature of 19.4°C (66.9°F) and an average low-temperature of 10.6°C (51.1°F).

What is the average humidity in September in Lucerne?

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

How many days does it rain in September in Lucerne?

In Lucerne, in September, during 10.2 rainfall days, 107mm (4.21") of precipitation is typically accumulated.

When it does not snow in Lucerne?

May through September are months without snowfall in Lucerne, Switzerland.

Does it snow in Lucerne in September?

In Lucerne, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Lucerne have in September?

The average day length in September is 12h and 34min.

What time are sunrise and sunset in September in Lucerne?

On the first day of September in Lucerne, sunrise is at 06:46 and sunset at 20:06. On the last day of the month, sunrise is at 07:24 and sunset at 19:08 CEST.

How long on average sun shines in September in Lucerne?

In Lucerne, the average sunshine duration in September is 4.6h.

What is the UV index reading in September in Lucerne?

In September, the average daily maximum UV index in Lucerne, Switzerland, is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

23.8°C 74.8°F

19.4°C 66.9°F

14.3°C 57.7°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average UV index

Average temperature in September
Lucerne, Switzerland

Average high temperature in September: 19.4°C

The warmest month (with the highest average high temperature) is July (24.7°C).
The month with the lowest average high temperature is January (3.4°C).

Average low temperature in September: 10.6°C

The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).

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Average humidity in September
Lucerne, Switzerland

Average humidity in September: 80%

The months with the highest relative humidity are November and December (84%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in September
Lucerne, Switzerland

Average rainfall in September: 107mm

The wettest month (with the highest rainfall) is June (154mm).
The driest month (with the least rainfall) is January (51mm).

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Average rainfall days in September
Lucerne, Switzerland

Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is June (13.5 days).
The month with the least rainy days is February (8.7 days).

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Average snowfall in September
Lucerne, Switzerland

Average snowfall in September: 0mm

The month with the highest snowfall is February (202mm).
The months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in September
Lucerne, Switzerland

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Lucerne, 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: 4h and 4min

The month with the most sunshine is July (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 12min).

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Average UV index in September
Lucerne, Switzerland

Average UV index in September: 5

The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are January, November and December (UV index 1).

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September weather forecast
Lucerne, Switzerland

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