September weather forecastSchengen, Luxembourg
September
Weather in September
September brings the initial signs of fall in Schengen, with temperatures starting to decrease. As days become shorter, and leaves start to acquire autumn hues, residents begin to prepare for winter. Expecting rain becomes a norm yet the precipitation is lesser compared to August. Humidity rises moderately, providing a distinct feel to the autumnal air. A slight uptick in wind speed is also noticed, blending perfectly with the cooling temperature.Temperature
The transition into September in Schengen subtly indicates a reduction in the average high-temperature, down to a refreshing 19.2°C (66.6°F) from August's moderately hot 23.1°C (73.6°F). Schengen encounters an average low-temperature of 9.5°C (49.1°F) during September nights.Humidity
The average relative humidity in September in Schengen is 79%.Rainfall
In Schengen, in September, it is raining for 11.7 days, with typically 40mm (1.57") of accumulated precipitation. In Schengen, during the entire year, the rain falls for 185.5 days and collects up to 593mm (23.35") of precipitation.Snowfall
April through September are months without snowfall.Daylight
The average length of the day in September in Schengen 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, sunrise is at 07:33 and sunset at 19:15 CEST.
Sunshine
In Schengen, the average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, a regular UV index of 3 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Schengen, Luxembourg
- Average high temperature in September: 19.2°C
The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-0.7°C).
Average pressure in September
Schengen, Luxembourg
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1018.6mbar).
The month with the lowest atmospheric pressure is November (1014.2mbar).
Average wind speed in September
Schengen, Luxembourg
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is February (15.3km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in September
Schengen, Luxembourg
- Average humidity in September: 79%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Schengen, Luxembourg
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (71mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in September
Schengen, Luxembourg
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is September (11.7 days).
Average snowfall in September
Schengen, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is December (55mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Schengen, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Schengen, Luxembourg
- Average daylight in September: 12h and 36min
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 6min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Schengen, Luxembourg
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is December (8.4 days).
Average UV index in September
Schengen, 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).
Average cloud cover in September
Schengen, Luxembourg
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Schengen, Luxembourg
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
