September weather forecastHerborn, Luxembourg
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Herborn, Luxembourg, with temperature in the range of an average high of 18.5°C (65.3°F) and an average low of 9°C (48.2°F).Temperature
A modest decline in the average high-temperature is seen during September, decreasing from an agreeable 22.6°C (72.7°F) in August to a comfortable 18.5°C (65.3°F). During September, Herborn's temperature falls to a steady low-temperature average of 9°C (48.2°F).Humidity
In September, the average relative humidity is 80%.Rainfall
In Herborn, during September, the rain falls for 9.6 days and regularly aggregates up to 26mm (1.02") of precipitation. In Herborn, 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 in Herborn.Daylight
The average length of the day in September is 12h and 36min.On the first day of September in Herborn, sunrise is at 06:50 and sunset at 20:17. On the last day of the month, sunrise is at 07:33 and sunset at 19:14 CEST.
Sunshine
In Herborn, the average sunshine in September is 8.2h.UV index
In Herborn, Luxembourg, 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 exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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
Herborn, 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).
