September weather forecastHaller, Luxembourg
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Haller, Luxembourg, with temperature in the range of an average low of 9°C (48.2°F) and an average high of 18.5°C (65.3°F).Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a pleasant 22.6°C (72.7°F) in August to a comfortable 18.5°C (65.3°F). During September, Haller experiences an average low-temperature of 9°C (48.2°F) at night.Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 9.6 days. Throughout September, 26mm (1.02") of precipitation is accumulated. In Haller, during the entire year, the rain falls for 170 days and collects up to 516mm (20.31") of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Haller, Luxembourg, is 12h and 37min.On the first day of September in Haller, sunrise is at 06:51 and sunset at 20:18. On the last day of the month, sunrise is at 07:34 and sunset at 19:15 CEST.
Sunshine
In September, the average sunshine in Haller is 8.2h.UV index
In Haller, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Haller, Luxembourg
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is July (22.7°C).
The month with the lowest average high temperature is January (3.1°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 (-1.3°C).
Average pressure in September
Haller, Luxembourg
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1014.2mbar).
Average wind speed in September
Haller, Luxembourg
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is February (14.7km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).
Average humidity in September
Haller, Luxembourg
- Average humidity in September: 80%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are April and August (76%).
Average rainfall in September
Haller, Luxembourg
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is December (69mm).
The driest month (with the least rainfall) is July (25mm).
Average rainfall days in September
Haller, Luxembourg
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is September (9.6 days).
Average snowfall in September
Haller, Luxembourg
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (66mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Haller, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Haller, 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: 8h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Haller, Luxembourg
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is December (7.6 days).
Average UV index in September
Haller, 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
Haller, 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
Haller, 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 November and December (7km).
