September weather forecastArlesheim, Switzerland
September
Weather in September
September, the first month of the autumn in Arlesheim, is still a comfortable month, with an average temperature fluctuating between 9.4°C (48.9°F) and 19.7°C (67.5°F).Temperature
The beginning of September brings a minor change in the average high-temperature, shifting from a moderately hot 24.1°C (75.4°F) in August to a refreshing 19.7°C (67.5°F). Arlesheim usually reports an average low-temperature of 9.4°C (48.9°F) during the month of September.Humidity
In Arlesheim, Switzerland, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall in Arlesheim is September, when the rain falls for 12.5 days and typically collects 33mm (1.3") of precipitation.Snowfall
April through September are months without snowfall in Arlesheim, Switzerland.Daylight
In September, the average length of the day in Arlesheim is 12h and 34min.On the first day of the month, sunrise is at 06:48 and sunset at 20:09. On the last day of September, in Arlesheim, sunrise is at 07:27 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arlesheim, Switzerland
- Average high temperature in September: 19.7°C
The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 9.4°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-1.8°C).
Average pressure in September
Arlesheim, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The months with the lowest atmospheric pressure are April and November (1015.7mbar).
Average wind speed in September
Arlesheim, Switzerland
- Average wind speed in September: 7.1km/h
The windiest months (with the highest average wind speed) are February and March (9.9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Arlesheim, Switzerland
- Average humidity in September: 80%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Arlesheim, Switzerland
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is June (84mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Arlesheim, Switzerland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is October (11.5 days).
Average snowfall in September
Arlesheim, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (61mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Arlesheim, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Arlesheim, Switzerland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Arlesheim, Switzerland
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (16.8 days).
The months with the least sunshine days are May and June (8.3 days).
Average UV index in September
Arlesheim, Switzerland
- 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
Arlesheim, Switzerland
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Arlesheim, Switzerland
- 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).
