September weather forecastFlaach, Switzerland
September
Weather in September
September, the first month of the autumn in Flaach, is still a refreshing month, with an average temperature fluctuating between 8.4°C (47.1°F) and 19.9°C (67.8°F).Temperature
The arrival of September signals a subtle shift in temperature, down from a moderately hot 24.7°C (76.5°F) in August to a comfortable 19.9°C (67.8°F). An average low-temperature of 8.4°C (47.1°F) is noted during the month of September.Humidity
The average relative humidity in September in Flaach is 80%.Rainfall
In Flaach, during September, the rain falls for 10.2 days and regularly aggregates up to 24mm (0.94") of precipitation. Throughout the year, there are 134.8 rainfall days, and 471mm (18.54") of precipitation is accumulated.Snowfall
In Flaach, Switzerland, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 34min.On the first day of September in Flaach, sunrise is at 06:44 and sunset at 20:05. On the last day of the month, sunrise is at 07:23 and sunset at 19:06 CEST.
Sunshine
In Flaach, the average sunshine in September is 8.9h.UV index
In Flaach, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. To avoid the Sun's strongest rays, limit exposure around the mid-day period. 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
Average temperature in September
Flaach, Switzerland
- Average high temperature in September: 19.9°C
The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (3.2°C).
- Average low temperature in September: 8.4°C
The months with the highest average low temperature are July and August (12.2°C).
The coldest month (with the lowest average low temperature) is January (-3.2°C).
Average pressure in September
Flaach, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Flaach, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is March (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity in September
Flaach, Switzerland
- Average humidity in September: 80%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Flaach, Switzerland
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (61mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Flaach, Switzerland
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
Flaach, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Flaach, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Flaach, 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 54min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Flaach, Switzerland
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in September
Flaach, 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
Flaach, Switzerland
- Average cloud cover in September: 36
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Flaach, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, July and August (9km).
The month with the lowest visibility is January (7km).
