September weather forecastSiewiller, France
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Siewiller, France, with temperature in the range of an average low of 9.5°C (49.1°F) and an average high of 19.5°C (67.1°F).Temperature
September implies a soft temperature shift, with average high-temperatures reducing from August's warm 24°C (75.2°F) to a comfortable 19.5°C (67.1°F). During the month of September, an average temperature of 9.5°C (49.1°F) is noted during the nights in Siewiller.Humidity
In Siewiller, France, the average relative humidity in September is 79%.Rainfall
In Siewiller, France, in September, during 12.5 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, in Siewiller, there are 179.6 rainfall days, and 606mm (23.86") of precipitation is accumulated.Snowfall
In Siewiller, snow does not fall in June through September.Daylight
The average length of the day in September in Siewiller is 12h and 35min.On the first day of September in Siewiller, sunrise is at 06:48 and sunset at 20:13. On the last day of the month, sunrise is at 07:30 and sunset at 19:12 CEST.
Sunshine
In September, the average sunshine in Siewiller is 8.5h.UV index
In September, the average daily maximum UV index in Siewiller is 4. 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: A maximum UV index of 4 in September translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siewiller, France
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is August (24°C).
The month with the lowest average high temperature is January (3.6°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (13.1°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).
Average pressure in September
Siewiller, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1019.5mbar).
The month with the lowest atmospheric pressure is November (1015mbar).
Average wind speed in September
Siewiller, France
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest month (with the lowest average wind speed) is August (8.2km/h).
Average humidity in September
Siewiller, France
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Siewiller, France
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is December (69mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in September
Siewiller, France
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (11.9 days).
Average snowfall in September
Siewiller, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (90mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Siewiller, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Siewiller, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in September
Siewiller, France
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is April (14.8 days).
The month with the least sunshine days is June (9.5 days).
Average UV index in September
Siewiller, France
- Average UV index in September: 4
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
Siewiller, France
- Average cloud cover in September: 36
The months with the most cloud cover are January and December (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Siewiller, France
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
