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
September
Weather in September
Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a comfortable 16.2°C (61.2°F) in August to a cool 12°C (53.6°F). Throughout the nights in September, an average low-temperature of 2.8°C (37°F) is noted.Humidity
The average relative humidity in September is 83%.Rainfall
In Unterbäch, Switzerland, in September, during 16.2 rainfall days, 30mm (1.18") of precipitation is typically accumulated. In Unterbäch, during the entire year, the rain falls for 172.2 days and collects up to 522mm (20.55") of precipitation.Snowfall
Months with snowfall are January through June, August through December. In Unterbäch, in September, during 1.7 snowfall days, 12mm (0.47") of snow is typically accumulated. In Unterbäch, during the entire year, snow falls for 111 days and aggregates up to 1205mm (47.44") of snow.Daylight
In Unterbäch, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:49 and sunset at 20:07. On the last day of September, in Unterbäch, sunrise is at 07:26 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine is 8.2h.UV index
In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 2 in September leads to these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
How much does it snow in September?
How many hours of daylight does Unterbäch have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Unterbäch, Switzerland
- Average high temperature in September: 12°C
The warmest month (with the highest average high temperature) is July (16.3°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in September: 2.8°C
The months with the highest average low temperature are July and August (5.8°C).
The coldest month (with the lowest average low temperature) is February (-11.9°C).
Average pressure in September
Unterbäch, Switzerland
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1021mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Unterbäch, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is December (8.4km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity in September
Unterbäch, Switzerland
- Average humidity in September: 83%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is August (80%).
Average rainfall in September
Unterbäch, Switzerland
- Average rainfall in September: 30mm
The wettest months (with the highest rainfall) are June and August (67mm).
The driest month (with the least rainfall) is January (23mm).
Average rainfall days in September
Unterbäch, Switzerland
- Average rainfall days in September: 16.2 days
The month with the highest number of rainy days is July (23.4 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in September
Unterbäch, Switzerland
- Average snowfall in September: 12mm
The month with the highest snowfall is March (199mm).
The month with the least snowfall is July (0mm).
Average snowfall days in September
Unterbäch, Switzerland
- Average snowfall days in September: 1.7 days
The months with the highest number of snowfall days are January and March (18.1 days).
The month with the least snowfall days is July (0.1 days).
Average daylight in September /
Average sunshine in September
Unterbäch, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Unterbäch, Switzerland
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is October (15.2 days).
The month with the least sunshine days is July (3.8 days).
Average UV index in September
Unterbäch, Switzerland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, April and November (UV index 1).
Average cloud cover in September
Unterbäch, Switzerland
- Average cloud cover in September: 44
The month with the most cloud cover is March (Cloud cover 57).
The month with the least cloud cover is October (Cloud cover 40).
Average visibility in September
Unterbäch, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are July, August and October (8km).
The months with the lowest visibility are January, February and March (6km).
