September weather forecastLachen, Switzerland
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Lachen, Switzerland, with an average temperature varying between 7.4°C (45.3°F) and 17.9°C (64.2°F).Temperature
September is characterized by a slight reduction in average high-temperature, easing from a pleasant 22.5°C (72.5°F) in August to a refreshing 17.9°C (64.2°F). Lachen, in September, experiences an average temperature of 7.4°C (45.3°F) at night.Humidity
The average relative humidity in September is 82%.Rainfall
In Lachen, during September, the rain falls for 12.7 days and regularly aggregates up to 35mm (1.38") of precipitation. Throughout the year, in Lachen, there are 151 rainfall days, and 623mm (24.53") of precipitation is accumulated.Snowfall
In Lachen, snow does not fall in June through September.Daylight
The average length of the day in September in Lachen is 12h and 34min.On the first day of the month, sunrise is at 06:44 and sunset at 20:04. On the last day of September, in Lachen, sunrise is at 07:22 and sunset at 19:06 CEST.
Sunshine
In September, the average sunshine in Lachen is 8.7h.UV index
In Lachen, Switzerland, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lachen, Switzerland
- Average high temperature in September: 17.9°C
The warmest months (with the highest average high temperature) are July and August (22.5°C).
The month with the lowest average high temperature is January (2.2°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is August (11.1°C).
The coldest months (with the lowest average low temperature) are January and February (-4.3°C).
Average pressure in September
Lachen, 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 (1015.6mbar).
Average wind speed in September
Lachen, Switzerland
- Average wind speed in September: 6.1km/h
The windiest month (with the highest average wind speed) is March (8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).
Average humidity in September
Lachen, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is July (78%).
Average rainfall in September
Lachen, Switzerland
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is May (82mm).
The driest month (with the least rainfall) is November (31mm).
Average rainfall days in September
Lachen, Switzerland
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Lachen, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (202mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Lachen, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lachen, 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 36min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Lachen, Switzerland
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Lachen, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Lachen, Switzerland
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Lachen, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (8km).
The months with the lowest visibility are January and February (7km).
