September weather forecast
Mondorf-les-Bains, Luxembourg

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Weather in September

September in Mondorf-les-Bains marks the transition from summer to autumn. With temperatures beginning to descend, the city bids adieu to the scintillating summer. The metamorphosis from green landscapes to rust-hued arenas begins, depicting a picturesque setting. Cool winds gain momentum, whispering the arrival of the autumn season in September. And while the rainfall doesn’t call for a celebration, the mellow sun and moderate temperatures pose for a lovely outdoor weather.

Temperature

The transition into September in Mondorf-les-Bains is accompanied by a slight temperature decrease, with the average high-temperature shifting from an agreeable 22.8°C (73°F) in August to a refreshing 18.5°C (65.3°F). During September, Mondorf-les-Bains consistently records a temperature low averaging a chilly 9.5°C (49.1°F).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Mondorf-les-Bains, in September, it is raining for 12.5 days, with typically 40mm (1.57") of accumulated precipitation. In Mondorf-les-Bains, during the entire year, the rain falls for 187.2 days and collects up to 636mm (25.04") of precipitation.

Snowfall

In Mondorf-les-Bains, snow does not fall in June through September.

Daylight

The average length of the day in September in Mondorf-les-Bains is 12h and 36min.
On the first day of the month, sunrise is at 06:51 and sunset at 20:17. On the last day of September, in Mondorf-les-Bains, Luxembourg, sunrise is at 07:33 and sunset at 19:15 CEST.

Sunshine

In Mondorf-les-Bains, the average sunshine in September is 8h.

UV index

In September, the average daily maximum UV index in Mondorf-les-Bains is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

What are September temperatures in Mondorf-les-Bains?

The high-temperature, in September, in Mondorf-les-Bains, records 18.5°C (65.3°F), while the low-temperature is 9.5°C (49.1°F).

What is the average humidity in September in Mondorf-les-Bains?

In Mondorf-les-Bains, the average relative humidity in September is 79%.

How much does it rain in Mondorf-les-Bains in September?

In Mondorf-les-Bains, during September, the rain falls for 12.5 days and regularly aggregates up to 40mm (1.57") of precipitation.

When it does not snow in Mondorf-les-Bains?

June through September are months without snowfall in Mondorf-les-Bains, Luxembourg.

Does it snow in Mondorf-les-Bains in September?

In Mondorf-les-Bains, Luxembourg, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Mondorf-les-Bains?

In September, the average day length in Mondorf-les-Bains, Luxembourg, is 12h and 36min.

What time are sunrise and sunset in September in Mondorf-les-Bains?

In September, on the first day of the month, sunrise is at 06:51 and sunset at 20:17. On the last day of the month, sunrise is at 07:33 and sunset at 19:15 CEST.

How many hours of sunshine does Mondorf-les-Bains have in September?

The average sunshine duration in September is 8h.

How high is the UV index in September in Mondorf-les-Bains?

The average daily maximum UV index in September in Mondorf-les-Bains is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
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
Mondorf-les-Bains, Luxembourg

Average temperature in September - Mondorf-les-Bains, Luxembourg
  • Average high temperature in September: 18.5°C

The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (3.4°C).

  • Average low temperature in September: 9.5°C

The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).

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Average pressure in September
Mondorf-les-Bains, Luxembourg

Average pressure in September - Mondorf-les-Bains, Luxembourg
  • Average pressure in September: 1017.9mbar

The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1014.1mbar).

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Average wind speed in September
Mondorf-les-Bains, Luxembourg

Average wind speed in September - Mondorf-les-Bains, Luxembourg
  • Average wind speed in September: 10.3km/h

The windiest month (with the highest average wind speed) is February (15.6km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).

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Average humidity in September
Mondorf-les-Bains, Luxembourg

Average humidity in September - Mondorf-les-Bains, Luxembourg
  • Average humidity in September: 79%

The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (76%).

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Average rainfall in September
Mondorf-les-Bains, Luxembourg

Average rainfall in September - Mondorf-les-Bains, Luxembourg
  • Average rainfall in September: 40mm

The wettest month (with the highest rainfall) is December (75mm).
The driest month (with the least rainfall) is April (39mm).

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Average rainfall days in September
Mondorf-les-Bains, Luxembourg

Average rainfall days in September - Mondorf-les-Bains, Luxembourg
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is September (12.5 days).

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Average snowfall in September
Mondorf-les-Bains, Luxembourg

Average snowfall in September - Mondorf-les-Bains, Luxembourg
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (85mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Mondorf-les-Bains, Luxembourg

Average snowfall days in September - Mondorf-les-Bains, Luxembourg
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
Mondorf-les-Bains, Luxembourg

Average daylight in September / Average sunshine in September - Mondorf-les-Bains, Luxembourg
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).

  • Average sunshine in September: 8h and 0min

The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).

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Average sunshine days in September
Mondorf-les-Bains, Luxembourg

Average sunshine days in September - Mondorf-les-Bains, Luxembourg
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is December (8 days).

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Average UV index in September
Mondorf-les-Bains, Luxembourg

Average UV index in September - Mondorf-les-Bains, Luxembourg
  • Average UV index in September: 3

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).

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Average cloud cover in September
Mondorf-les-Bains, Luxembourg

Average cloud cover in September - Mondorf-les-Bains, Luxembourg
  • Average cloud cover in September: 41

The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 38).

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Average visibility in September
Mondorf-les-Bains, Luxembourg

Average visibility in September - Mondorf-les-Bains, Luxembourg
  • 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 November and December (7km).

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Mondorf-les-Bains, Luxembourg

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