September weather forecastSanem, Luxembourg
September
Weather in September
As September sets in, temperatures in Sanem begin their descent, signifying the commencement of autumn. The month shines with the highest sunshine days in the year at 15.1, a last remnant of the summer. The balance between declining temperatures, and moderate rainfall, lay a scenic fall landscape. Combining slightly lowered temperatures with more sunlit days, September paints a harmonious picture of early fall.Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from an agreeable 22.8°C (73°F) in August to a refreshing 18.5°C (65.3°F). Sanem in September experiences a low-temperature average of 9.5°C (49.1°F).Humidity
The average relative humidity in September is 79%.Rainfall
In Sanem, in September, it is raining for 12.5 days, with typically 40mm (1.57") of accumulated precipitation. In Sanem, Luxembourg, during the entire year, the rain falls for 187.2 days and collects up to 636mm (25.04") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Sanem, Luxembourg, the average length of the day in September 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 07:35 and sunset at 19:16 CEST.
Sunshine
The average sunshine in September in Sanem is 8h.UV index
In September, the average daily maximum UV index in Sanem is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 3 during September translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sanem, Luxembourg
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (3.4°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).
Average pressure in September
Sanem, Luxembourg
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1014.1mbar).
Average wind speed in September
Sanem, Luxembourg
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is February (15.6km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Sanem, 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
Sanem, Luxembourg
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (75mm).
The driest month (with the least rainfall) is April (39mm).
Average rainfall days in September
Sanem, Luxembourg
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is September (12.5 days).
Average snowfall in September
Sanem, Luxembourg
- Average snowfall in September: 0mm
The month with the highest snowfall is January (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sanem, Luxembourg
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sanem, 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 30min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Sanem, Luxembourg
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is December (8 days).
Average UV index in September
Sanem, 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
Sanem, Luxembourg
- Average cloud cover in September: 41
The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Sanem, 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).
