September weather forecastKopstal, Luxembourg
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Kopstal, Luxembourg, with an average temperature varying between 9°C (48.2°F) and 18.5°C (65.3°F).Temperature
September's arrival signals a moderate reduction in the average high-temperature, easing from a pleasant 22.6°C (72.7°F) in August to a comfortable 18.5°C (65.3°F). In the month of September, Kopstal experiences an average low-temperature of 9°C (48.2°F).Humidity
The average relative humidity in September in Kopstal is 80%.Rainfall
In Kopstal, in September, during 11.3 rainfall days, 35mm (1.38") of precipitation is typically accumulated. In Kopstal, during the entire year, the rain falls for 171.5 days and collects up to 545mm (21.46") of precipitation.Snowfall
In Kopstal, 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 06:52 and sunset at 20:19. On the last day of the month, sunrise is at 07:34 and sunset at 19:16 CEST.
Sunshine
In September, the average sunshine is 8.1h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 3 in September translates into this advice:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kopstal, Luxembourg
- Average high temperature in September: 18.5°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°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
Kopstal, Luxembourg
- Average pressure in September: 1017.9mbar
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
Kopstal, Luxembourg
- Average wind speed in September: 10.1km/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
Kopstal, Luxembourg
- Average humidity in September: 80%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Kopstal, Luxembourg
- Average rainfall in September: 35mm
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
Kopstal, Luxembourg
- Average rainfall days in September: 11.3 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
Kopstal, 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
Kopstal, 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
Kopstal, 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 6min).
Average sunshine days in September
Kopstal, Luxembourg
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in September
Kopstal, 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
Kopstal, 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
Kopstal, 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).
