Luxembourg City
Luxembourg
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Luxembourg City, Luxembourg

A scenic morning panorama of the rocky city of Luxembourg, in Luxembourg with a partly clear sky
A scenic morning panorama of the rocky city of Luxembourg, in Luxembourg with a partly clear sky
September, the first month of the autumn, in Luxembourg City, is also an enjoyable month, with average temperature varying between 10°C (50°F) and 18.4°C (65.1°F).

Temperature

In September, the average high-temperature slightly decreases, from a pleasant 22.8°C (73°F) in August, to a comfortable 18.4°C (65.1°F). The average low-temperature, is 10°C (50°F).

Humidity

The average relative humidity in Luxembourg City is 76%.

Rainfall

In Luxembourg City, during September, the rain falls for 12.6 days and regularly aggregates up to 76.3mm (3") of precipitation. Throughout the year, there are 182.3 rainfall days, and 897mm (35.3") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12.6h.

Sunshine

In September, the average sunshine is 5.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Luxembourg City?

In Luxembourg City, Luxembourg, in September, the average high-temperature is 18.4°C (65.1°F), and the average low-temperature is 10°C (50°F).

What is the average humidity in September in Luxembourg City?

In Luxembourg City, the average relative humidity in September is 76%.

How many days does it rain in September in Luxembourg City?

In Luxembourg City, Luxembourg, in September, it is raining for 12.6 days, with typically 76.3mm (3") of accumulated precipitation.

What is the average length of the day in September in Luxembourg City?

In September, the average length of the day in Luxembourg City is 12.6h.

How long on average sun shines in September in Luxembourg City?

In September, the average sunshine is 5.4h.

What is the UV index reading in September in Luxembourg City?

The average daily maximum UV index in September in Luxembourg City is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Luxembourg City, Luxembourg
  • Average high temperature in September: 18.4°C

The warmest month (with the highest average high temperature) is July (23.2°C).
The month with the lowest average high temperature is January (3.1°C).

  • Average low temperature in September: 10°C

The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-1.6°C).

Average humidity in September - Luxembourg City, Luxembourg
  • Average humidity in September: 76%

Months with the highest relative humidity are November and December (88%).
The month with the lowest relative humidity is July (67%).

Average rainfall in September - Luxembourg City, Luxembourg
  • Average rainfall in September: 76.3mm

The wettest month (with the highest rainfall) is October (86.8mm).
The driest month (with the lowest rainfall) is April (58.2mm).

Average rainfall days in September - Luxembourg City, Luxembourg
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is January (18.3 days).
The month with the lowest number of rainy days is July (12.5 days).

Average daylight in September / Average sunshine in September - Luxembourg City, Luxembourg
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.2h).

  • Average sunshine in September: 5.4h

The month with most sunshine is July (Average sunshine: 8.1h).
The month with least sunshine is December (Average sunshine: 1.3h).

Average UV index in September - Luxembourg City, Luxembourg
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 1).