Temperatures in September
It's pleasantly warm in September in Chiasso with an average temperature of 21°C. Temperatures this month range from a low of 17°C to a high of 23°C. At night, you can expect temperatures between 10°C and 15°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Chiasso in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Chiasso with warm temperatures, averaging around 23°C during the day and nights close to 15°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-September
By mid-September, the average daytime temperature drops to around 22°C, with nights close to 14°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Chiasso will be around 19°C, with nights close to 11°C. A shower might show up, but overall the weather will be dry and sunny.
Discover cheap trips to Chiasso 
Precipitation in September
In September, there is an average of 106 mm of precipitation, spread over 9 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
The average precipitation chance is 30% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Chiasso. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Chiasso in September |
London | ||
|---|---|---|---|
 Average Temperature |
21°C | 20°C | |
 High Temp |
23°C | 22°C | |
| Low Temp |
17°C | 17°C | |
 Total Precipitation |
106 mm | 44 mm | |
| Rainy Days |
9 days | 8 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Chiasso?
After some sun? Then September isn’t the best time to be in Chiasso. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Chiasso in September
With 30°C, Chiasso hit the highest temperature in the last 10 years in September 2022. The lowest daytime temperature in this month was 10°C in 2022. The extreme night temperatures ranged from a low of 3°C to a high of 18°C.
Check out the climate of Chiasso for all months and discover the best travel time
Curious about the climate in other parts of Switzerland? Check out the weather and climate in places like Zurich, Geneva, Valais, or have a look at other destinations in Switzerland.
Plan your next holiday
Don’t miss the best holiday deals for Chiasso and see what our partners have for you.
Daily Temperature in September in Chiasso
This chart shows the average daily temperatures, both day and night, for each day in September in Chiasso, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Chiasso
The chart below shows the average daily precipitation in September for Chiasso, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 9 days of rain in Chiasso.
Daily UV Index in September in Chiasso
This chart shows the average daily UV index in September in Chiasso, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Chiasso Over the Years
This chart shows the average temperature in September in Chiasso, measured in degrees Celsius, over the past years.
Total Precipitation in September in Chiasso Over the Years
This chart shows the average precipitation in September in Chiasso, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Chiasso
Click on a specific day in September for detailed info on the typical weather on that day in Chiasso. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Chiasso
Have you been to Chiasso in September?
Share your weather experience in September in Chiasso.
Average Weather in Chiasso by Month
Click on a month below to see detailed weather info for Chiasso. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
