September weather forecastMarnach, Luxembourg
September
Weather in September
September in Marnach is suggestive of a transition to the mellower autumn season, with temperatures taking a slight dip to an average high of 17.2°C (63°F). This month marks the end of the long, hot summer days and the inception of the cool, crisp autumn weather. Substantial daylight hours persist, allowing residents and visitors to enjoy the beautiful fall colours spread across the city's landscapes. Despite the decrease in temperatures, the weather in September remains reasonably warm and sunny. The cooling weather and falling leaves exude a mesmerizing atmosphere, making it the ideal month to experience Marnach’s autumn charm.Temperature
The start of September in Marnach involves a subtle temperature drop, shifting from an agreeable 20.9°C (69.6°F) in August to a comfortable 17.2°C (63°F). In the month of September, the temperature generally rests at an average low of 8.1°C (46.6°F).Humidity
The average relative humidity in September in Marnach is 84%.Rainfall
In Marnach, in September, it is raining for 12.5 days, with typically 34mm (1.34") of accumulated precipitation. In Marnach, during the entire year, the rain falls for 166.4 days and collects up to 566mm (22.28") of precipitation.Snowfall
In Marnach, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 06:51 and sunset at 20:19. On the last day of September, in Marnach, Luxembourg, sunrise is at 07:35 and sunset at 19:16 CEST.
Sunshine
In Marnach, the average sunshine in September is 7.4h.UV index
In Marnach, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Take precautions - Protection against sunburn is recommended. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marnach, Luxembourg
- Average high temperature in September: 17.2°C
The warmest month (with the highest average high temperature) is August (20.9°C).
The month with the lowest average high temperature is January (2.4°C).
- Average low temperature in September: 8.1°C
The month with the highest average low temperature is July (11.2°C).
The coldest month (with the lowest average low temperature) is January (-1.9°C).
Average pressure in September
Marnach, Luxembourg
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1013.7mbar).
Average wind speed in September
Marnach, Luxembourg
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is February (16.2km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in September
Marnach, Luxembourg
- Average humidity in September: 84%
The months with the highest relative humidity are January, November and December (92%).
The month with the lowest relative humidity is April (79%).
Average rainfall in September
Marnach, Luxembourg
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is December (66mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in September
Marnach, Luxembourg
- Average rainfall days in September: 12.5 days
The months with the highest number of rainy days are June and July (17.3 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in September
Marnach, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is February (105mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Marnach, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marnach, Luxembourg
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 24min
The months with the most sunshine are July and August (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in September
Marnach, Luxembourg
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Marnach, Luxembourg
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Marnach, Luxembourg
- Average cloud cover in September: 47
The month with the most cloud cover is December (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 43).
Average visibility in September
Marnach, Luxembourg
- Average visibility in September: 8km
The month with the highest visibility is April (9km).
The months with the lowest visibility are November and December (7km).
