September weather forecastTrachselwald, Switzerland
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Trachselwald, Switzerland, with temperature in the range of an average high of 18.3°C (64.9°F) and an average low of 7.5°C (45.5°F).Temperature
Trachselwald's September weather shows a modest shift in high-temperatures, falling from August's pleasant 22.3°C (72.1°F) to an enjoyable 18.3°C (64.9°F). During September, Trachselwald experiences an average low-temperature of 7.5°C (45.5°F) at night.Humidity
The average relative humidity in September in Trachselwald is 81%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.8 days and typically collects 37mm (1.46") of precipitation.Snowfall
In Trachselwald, snow does not fall in June through September.Daylight
In September, the average length of the day in Trachselwald is 12h and 34min.On the first day of September in Trachselwald, Switzerland, sunrise is at 06:49 and sunset at 20:08. On the last day of the month, sunrise is at 07:27 and sunset at 19:10 CEST.
Sunshine
The average sunshine in September in Trachselwald is 8.8h.UV index
The average daily maximum UV index in September in Trachselwald, Switzerland, is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. To avoid the Sun's strongest rays, limit exposure around the mid-day 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
Trachselwald, Switzerland
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is July (22.5°C).
The month with the lowest average high temperature is January (2.3°C).
- Average low temperature in September: 7.5°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is February (-4.3°C).
Average pressure in September
Trachselwald, Switzerland
- Average pressure in September: 1018.6mbar
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
Trachselwald, Switzerland
- Average wind speed in September: 6.5km/h
The windiest month (with the highest average wind speed) is March (8.6km/h).
The calmest month (with the lowest average wind speed) is August (6.1km/h).
Average humidity in September
Trachselwald, Switzerland
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Trachselwald, Switzerland
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is June (99mm).
The driest month (with the least rainfall) is September (37mm).
Average rainfall days in September
Trachselwald, Switzerland
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in September
Trachselwald, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (269mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Trachselwald, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Trachselwald, 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 48min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Trachselwald, Switzerland
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Trachselwald, 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, October, November and December (UV index 2).
Average cloud cover in September
Trachselwald, Switzerland
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Trachselwald, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).
