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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 24.6°C (76.3°F) in August to a pleasant 20.2°C (68.4°F). Throughout September, a steady low-temperature average of 9.3°C (48.7°F) is noted.Humidity
In Castagnola, the average relative humidity in September is 76%.Rainfall
In Castagnola, in September, during 8.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated. Throughout the year, in Castagnola, there are 102.6 rainfall days, and 414mm (16.3") of precipitation is accumulated.Snowfall
In Castagnola, snow does not fall in April through October.Daylight
The average length of the day in September 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 Castagnola, sunrise is at 07:21 and sunset at 19:05 CEST.
Sunshine
In September, the average sunshine in Castagnola is 9.2h.UV index
In Castagnola, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What is the temperature in September in Castagnola?
What is the average humidity in September in Castagnola?
How much does it rain in Castagnola in September?
When it does not snow in Castagnola?
How many hours of daylight does Castagnola have in September?
What time are sunrise and sunset in September in Castagnola?
How long on average sun shines in September in Castagnola?
What is the UV index reading in September in Castagnola?
Average temperature in September
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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
Castagnola, 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).
Castagnola, Switzerland
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