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
With the onset of September, the average high-temperature subtly recedes from August's warm 24.6°C (76.3°F) to an agreeable 20.2°C (68.4°F). Caslano experiences a mean temperature of 9.3°C (48.7°F) during September nights.Humidity
In Caslano, Switzerland, the average relative humidity in September is 76%.Rainfall
In Caslano, in September, it is raining for 8.3 days, with typically 16mm (0.63") of accumulated precipitation. In Caslano, during the entire year, the rain falls for 102.6 days and collects up to 414mm (16.3") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 06:45 and sunset at 20:02. On the last day of September, in Caslano, sunrise is at 07:22 and sunset at 19:06 CEST.
Sunshine
The average sunshine in September in Caslano is 9.2h.UV index
In Caslano, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What is the usual temperature for Caslano in September?
What is the average humidity in September in Caslano?
How much does it rain in Caslano in September?
When it does not snow in Caslano?
What is the average length of the day in September in Caslano?
When are sunrise and sunset in September in Caslano?
How long on average sun shines in September in Caslano?
What is the UV index intensity in September in Caslano?
Average temperature in September
Caslano, Switzerland
- Average high temperature in September: 20.2°C
The warmest month (with the highest average high temperature) is July (25.2°C).
The month with the lowest average high temperature is January (4.5°C).
- Average low temperature in September: 9.3°C
The months with the highest average low temperature are July and August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).
Average pressure in September
Caslano, Switzerland
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Caslano, Switzerland
- Average wind speed in September: 7km/h
The windiest month (with the highest average wind speed) is July (7.7km/h).
The calmest month (with the lowest average wind speed) is November (6.1km/h).
Average humidity in September
Caslano, Switzerland
- Average humidity in September: 76%
The month with the highest relative humidity is November (80%).
The months with the lowest relative humidity are January and July (72%).
Average rainfall in September
Caslano, Switzerland
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is November (70mm).
The driest month (with the least rainfall) is January (7mm).
Average rainfall days in September
Caslano, Switzerland
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is December (4.1 days).
Average snowfall in September
Caslano, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Caslano, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Caslano, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Caslano, Switzerland
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is June (16.9 days).
Average UV index in September
Caslano, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Caslano, Switzerland
- Average cloud cover in September: 31
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Caslano, Switzerland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, November and December (9km).
The month with the lowest visibility is October (8km).
Caslano, Switzerland
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