September weather forecastErlen, Switzerland
September
Weather in September
September, the first month of the autumn in Erlen, is still a comfortable month, with an average temperature fluctuating between 18.6°C (65.5°F) and 8.6°C (47.5°F).Temperature
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's warm 23°C (73.4°F) to a refreshing 18.6°C (65.5°F). Erlen records a consistent low-temperature of 8.6°C (47.5°F) during September nights.Humidity
In Erlen, the average relative humidity in September is 78%.Rainfall
In Erlen, Switzerland, in September, it is raining for 14.3 days, with typically 57mm (2.24") of accumulated precipitation. In Erlen, during the entire year, the rain falls for 177.8 days and collects up to 1006mm (39.61") of precipitation.Snowfall
In Erlen, 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 Erlen, sunrise is at 06:42 and sunset at 20:03. On the last day of the month, sunrise is at 07:21 and sunset at 19:04 CEST.
Sunshine
In September, the average sunshine in Erlen, Switzerland, is 9.2h.UV index
The average daily maximum UV index in September in Erlen is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during September translates into the following guidance:
Make use of precautions - Suggestions to resist sunburn are communicated. To protect against the Sun's most potent rays, avoid direct exposure around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Erlen, Switzerland
- Average high temperature in September: 18.6°C
The warmest month (with the highest average high temperature) is July (23.1°C).
The month with the lowest average high temperature is January (2.9°C).
- Average low temperature in September: 8.6°C
The months with the highest average low temperature are July and August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).
Average pressure in September
Erlen, 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
Erlen, Switzerland
- Average wind speed in September: 6.9km/h
The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Erlen, Switzerland
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Erlen, Switzerland
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is August (126mm).
The driest month (with the least rainfall) is April (52mm).
Average rainfall days in September
Erlen, Switzerland
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in September
Erlen, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (353mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Erlen, Switzerland
- Average snowfall days in September: 0.1 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 and August (0 days).
Average daylight in September /
Average sunshine in September
Erlen, 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: 9h and 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Erlen, Switzerland
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is July (6.6 days).
Average UV index in September
Erlen, 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
Erlen, Switzerland
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Erlen, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August, October and November (9km).
The months with the lowest visibility are January, February, March, September and December (8km).
