September weather forecastAssel, Luxembourg
September
Weather in September
September, the first month of the autumn in Assel, is still a comfortable month, with an average temperature fluctuating between 18.7°C (65.7°F) and 9.3°C (48.7°F).Temperature
September brings a slight decrease in temperature, down from a pleasant 22.6°C (72.7°F) in August to an enjoyable 18.7°C (65.7°F). During September, Assel witnesses a consistent average low-temperature of 9.3°C (48.7°F).Humidity
The average relative humidity in September in Assel, Luxembourg, is 79%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 40mm (1.57") of precipitation is accumulated. Throughout the year, in Assel, there are 171.8 rainfall days, and 550mm (21.65") of precipitation is accumulated.Snowfall
In Assel, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 36min.On the first day of September, 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.
Sunshine
The average sunshine in September in Assel is 8h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 3 in September translates into these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Assel, Luxembourg
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (22.6°C).
The month with the lowest average high temperature is January (3.2°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-1.2°C).
Average pressure in September
Assel, Luxembourg
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is November (1014.1mbar).
Average wind speed in September
Assel, Luxembourg
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is February (15.2km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in September
Assel, 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%).
Average rainfall in September
Assel, Luxembourg
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (61mm).
The driest month (with the least rainfall) is April (33mm).
Average rainfall days in September
Assel, Luxembourg
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Assel, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is December (71mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Assel, Luxembourg
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Assel, 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 0min
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 6min).
Average sunshine days in September
Assel, Luxembourg
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in September
Assel, 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
Assel, Luxembourg
- Average cloud cover in September: 40
The month with the most cloud cover is December (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Assel, 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 January, February, May, June, September, October, November and December (8km).
