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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 25.2°C (77.4°F) in August to a pleasant 20.6°C (69.1°F). An average low-temperature of 10.9°C (51.6°F) is noted during the month of September.Humidity
The average relative humidity in September in Chiasso is 75%.Rainfall
In Chiasso, in September, during 16.2 rainfall days, 75mm (2.95") of precipitation is typically accumulated. In Chiasso, during the entire year, the rain falls for 172.9 days and collects up to 1265mm (49.8") of precipitation.Snowfall
In Chiasso, snow does not fall in June through September.Daylight
In Chiasso, 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, sunrise is at 07:21 and sunset at 19:05 CEST.
Sunshine
The average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September in Chiasso is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Chiasso in September?
What is the average humidity in September in Chiasso?
How much does it rain in Chiasso in September?
When it does not snow in Chiasso?
Does it snow in Chiasso in September?
How many hours of daylight does Chiasso have in September?
When is the sunrise / sunset in September in Chiasso?
How long on average sun shines in September in Chiasso?
What is the UV index intensity in September in Chiasso?
Average temperature in September
Chiasso, Switzerland
- Average high temperature in September: 20.6°C
The warmest month (with the highest average high temperature) is July (25.6°C).
The month with the lowest average high temperature is January (4.7°C).
- Average low temperature in September: 10.9°C
The month with the highest average low temperature is August (14.6°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure in September
Chiasso, Switzerland
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is December (1020.3mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).
Average wind speed in September
Chiasso, Switzerland
- Average wind speed in September: 6.2km/h
The windiest month (with the highest average wind speed) is March (6.9km/h).
The calmest month (with the lowest average wind speed) is November (5.6km/h).
Average humidity in September
Chiasso, Switzerland
- Average humidity in September: 75%
The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Chiasso, Switzerland
- Average rainfall in September: 75mm
The wettest month (with the highest rainfall) is November (181mm).
The driest month (with the least rainfall) is January (36mm).
Average rainfall days in September
Chiasso, Switzerland
- Average rainfall days in September: 16.2 days
The month with the highest number of rainy days is June (21.6 days).
The month with the least rainy days is January (5 days).
Average snowfall in September
Chiasso, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (402mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Chiasso, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chiasso, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Chiasso, Switzerland
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is June (4.4 days).
Average UV index in September
Chiasso, Switzerland
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Chiasso, Switzerland
- Average cloud cover in September: 28
The month with the most cloud cover is November (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Chiasso, Switzerland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
