Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The average high-temperature shows a slight dip in September, from August's moderately hot 23°C (73.4°F) to an enjoyable 18.7°C (65.7°F). An average low-temperature of 8.3°C (46.9°F) is recorded in the month of September in Pieterlen.Humidity
In September, the average relative humidity in Pieterlen is 82%.Rainfall
September is the month with the least rainfall. Rain falls for 15 days and accumulates 46mm (1.81") of precipitation.Snowfall
Months with snowfall in Pieterlen are January through May, September through December. September is the first month it typically snows in Pieterlen. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Pieterlen, there are 37.6 snowfall days, and 557mm (21.93") of snow is accumulated.Daylight
In Pieterlen, Switzerland, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 06:50 and sunset at 20:10. On the last day of the month, sunrise is at 07:28 and sunset at 19:12 CEST.
Sunshine
In September, the average sunshine in Pieterlen is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What is the average September temperature in Pieterlen?
What is the average humidity in September in Pieterlen?
What is the driest month in Pieterlen?
How many days does it rain in September in Pieterlen?
When does it start to snow in Pieterlen?
How many hours of daylight does Pieterlen have in September?
What time are sunrise and sunset in September in Pieterlen?
How long on average sun shines in September in Pieterlen?
How high is the UV index in September in Pieterlen?
Average temperature in September
Pieterlen, Switzerland
- Average high temperature in September: 18.7°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 (2.7°C).
- Average low temperature in September: 8.3°C
The month with the highest average low temperature is July (11.9°C).
The coldest months (with the lowest average low temperature) are January and February (-2.8°C).
Average pressure in September
Pieterlen, 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
Pieterlen, Switzerland
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest month (with the lowest average wind speed) is August (6.3km/h).
Average humidity in September
Pieterlen, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April, July and August (79%).
Average rainfall in September
Pieterlen, Switzerland
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is June (97mm).
The driest month (with the least rainfall) is September (46mm).
Average rainfall days in September
Pieterlen, Switzerland
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is May (21.9 days).
The month with the least rainy days is February (12.3 days).
Average snowfall in September
Pieterlen, Switzerland
- Average snowfall in September: 1mm
The month with the highest snowfall is February (133mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Pieterlen, Switzerland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Pieterlen, Switzerland
- Average daylight in September: 12h and 4min
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 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Pieterlen, Switzerland
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is October (14.1 days).
The month with the least sunshine days is May (6.7 days).
Average UV index in September
Pieterlen, 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
Pieterlen, Switzerland
- Average cloud cover in September: 37
The months with the most cloud cover are January, February and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Pieterlen, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are March, April, July and August (9km).
The months with the lowest visibility are January, February, May, June, September, October, November and December (8km).
Pieterlen, Switzerland
Weather forecast for your location
2. Allow the app to use your location
