September weather forecastUseldange, Luxembourg
September
Weather in September
Transitioning from summer to autumn, September in Useldange witnesses a slight drop in temperatures, from 8.5°C (47.3°F) to 17.5°C (63.5°F). In comparison to August, clouds start playing a more prominent role, with an increase in cloud coverage. Rainfall registers a decrease, while daylight hours continue the downward trend started in August. Still, September's weather remains largely comfortable for outdoor activities, with moderate temperatures, manageable humidity levels, and beautiful changing foliage of the trees.Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's agreeable 21.7°C (71.1°F) to a comfortable 17.5°C (63.5°F). September witnesses an average low-temperature hovering around a frosty 8.5°C (47.3°F).Humidity
In September, the average relative humidity in Useldange is 82%.Rainfall
In Useldange, in September, it is raining for 13.1 days, with typically 39mm (1.54") of accumulated precipitation. Throughout the year, there are 190.3 rainfall days, and 626mm (24.65") of precipitation is accumulated.Snowfall
In Useldange, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 37min.On the first day of the month, sunrise is at 06:52 and sunset at 20:19. On the last day of September, in Useldange, sunrise is at 07:35 and sunset at 19:16 CEST.
Sunshine
In Useldange, the average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index in Useldange is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Useldange, Luxembourg
- Average high temperature in September: 17.5°C
The warmest month (with the highest average high temperature) is August (21.7°C).
The month with the lowest average high temperature is January (2.7°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is August (11.8°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure in September
Useldange, Luxembourg
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).
Average wind speed in September
Useldange, Luxembourg
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is February (15.9km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Useldange, Luxembourg
- Average humidity in September: 82%
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and August (79%).
Average rainfall in September
Useldange, Luxembourg
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is December (70mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in September
Useldange, Luxembourg
- Average rainfall days in September: 13.1 days
The months with the highest number of rainy days are June and July (19.1 days).
The month with the least rainy days is February (12.7 days).
Average snowfall in September
Useldange, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is January (78mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Useldange, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Useldange, 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 54min
The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Useldange, Luxembourg
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in September
Useldange, 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, March, November and December (UV index 2).
Average cloud cover in September
Useldange, Luxembourg
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Useldange, Luxembourg
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are November and December (7km).
