September weather forecastSonvilier, Switzerland
September
Weather in September
September, the first month of the autumn in Sonvilier, is also an enjoyable month, with an average temperature varying between 17.7°C (63.9°F) and 8°C (46.4°F).Temperature
September reveals a small adjustment in temperature, transitioning from an average high of a pleasant 21.9°C (71.4°F) in August to a refreshing 17.7°C (63.9°F). An average low-temperature of 8°C (46.4°F) is recorded during the nights in September in Sonvilier.Humidity
The average relative humidity in September in Sonvilier is 85%.Rainfall
September is the month with the least rainfall. Rain falls for 16 days and accumulates 59mm (2.32") of precipitation.Snowfall
In Sonvilier, snow does not fall in June through September.Daylight
The average length of the day in September in Sonvilier, Switzerland, is 12h and 34min.On the first day of the month, sunrise is at 06:52 and sunset at 20:11. On the last day of September, in Sonvilier, sunrise is at 07:30 and sunset at 19:13 CEST.
Sunshine
In September, the average sunshine is 8h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sonvilier, Switzerland
- Average high temperature in September: 17.7°C
The warmest months (with the highest average high temperature) are July and August (21.9°C).
The month with the lowest average high temperature is January (2.3°C).
- Average low temperature in September: 8°C
The months with the highest average low temperature are July and August (11.6°C).
The coldest month (with the lowest average low temperature) is February (-3°C).
Average pressure in September
Sonvilier, Switzerland
- Average pressure in September: 1018.7mbar
The month with the highest atmospheric pressure is December (1021mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Sonvilier, Switzerland
- Average wind speed in September: 8.2km/h
The windiest month (with the highest average wind speed) is February (12km/h).
The calmest month (with the lowest average wind speed) is August (7.1km/h).
Average humidity in September
Sonvilier, Switzerland
- Average humidity in September: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (81%).
Average rainfall in September
Sonvilier, Switzerland
- Average rainfall in September: 59mm
The wettest month (with the highest rainfall) is June (140mm).
The driest month (with the least rainfall) is September (59mm).
Average rainfall days in September
Sonvilier, Switzerland
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is June (23.6 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
Sonvilier, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (515mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sonvilier, Switzerland
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (16.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Sonvilier, Switzerland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Sonvilier, Switzerland
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is October (13 days).
The month with the least sunshine days is June (4.2 days).
Average UV index in September
Sonvilier, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Sonvilier, Switzerland
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Sonvilier, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (8km).
The month with the lowest visibility is January (7km).
