Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's pleasant 20.9°C (69.6°F) to an enjoyable 17.4°C (63.3°F). Vianden throughout September, experiences an average nighttime temperature of 7.9°C (46.2°F).Humidity
In Vianden, Luxembourg, the average relative humidity in September is 84%.Rainfall
In September, in Vianden, the rain falls for 14.1 days. Throughout September, 38mm (1.5") of precipitation is accumulated. In Vianden, during the entire year, the rain falls for 189.4 days and collects up to 645mm (25.39") of precipitation.Snowfall
June through September are months without snowfall in Vianden.Daylight
In Vianden, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 06:51 and sunset at 20:18. On the last day of September, in Vianden, sunrise is at 07:34 and sunset at 19:15 CEST.
Sunshine
The average sunshine in September in Vianden is 7.2h.UV index
In Vianden, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 3 during September translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Vianden in September?
What is the average humidity in September in Vianden?
How much does it rain in Vianden in September?
When it does not snow in Vianden?
Does it snow in Vianden in September?
How many hours of daylight does Vianden have in September?
When is the sunrise / sunset in September in Vianden?
How long on average sun shines in September in Vianden?
How high is the UV index in September in Vianden?
Average temperature in September
Vianden, Luxembourg
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is August (20.9°C).
The month with the lowest average high temperature is January (2.5°C).
- Average low temperature in September: 7.9°C
The months with the highest average low temperature are July and August (11.1°C).
The coldest months (with the lowest average low temperature) are January and February (-1.8°C).
Average pressure in September
Vianden, Luxembourg
- Average pressure in September: 1017.8mbar
The months with the highest atmospheric pressure are September and December (1017.8mbar).
The month with the lowest atmospheric pressure is November (1013.8mbar).
Average wind speed in September
Vianden, Luxembourg
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is February (16.2km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).
Average humidity in September
Vianden, Luxembourg
- Average humidity in September: 84%
The month with the highest relative humidity is December (93%).
The month with the lowest relative humidity is April (79%).
Average rainfall in September
Vianden, Luxembourg
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is December (76mm).
The driest month (with the least rainfall) is April (37mm).
Average rainfall days in September
Vianden, Luxembourg
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in September
Vianden, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is February (90mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Vianden, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Vianden, Luxembourg
- Average daylight in September: 12h and 4min
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 1min
The month with the most sunshine is July (Average sunshine: 8h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 36min).
Average sunshine days in September
Vianden, Luxembourg
- Average sunshine days in September: 13 days
The month with the most sunshine days is September (13 days).
The month with the least sunshine days is June (7.2 days).
Average UV index in September
Vianden, Luxembourg
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Vianden, Luxembourg
- Average cloud cover in September: 48
The month with the most cloud cover is December (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 44).
Average visibility in September
Vianden, Luxembourg
- Average visibility in September: 8km
The month with the highest visibility is April (9km).
The months with the lowest visibility are January, October, November and December (7km).
Vianden, Luxembourg
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