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
A mild shift in the average high-temperature occurs in September, reducing from a moderately hot 25.9°C (78.6°F) in August to an agreeable 21°C (69.8°F). Mendrisio sees an average low-temperature of 11.5°C (52.7°F) during September.Humidity
In Mendrisio, the average relative humidity in September is 74%.Rainfall
In Mendrisio, in September, during 15.4 rainfall days, 67mm (2.64") of precipitation is typically accumulated. In Mendrisio, during the entire year, the rain falls for 172.1 days and collects up to 1177mm (46.34") of precipitation.Snowfall
April through September are months without snowfall in Mendrisio.Daylight
In Mendrisio, the average length of the day in September is 12h and 32min.On the first day of September in Mendrisio, Switzerland, sunrise is at 06:45 and sunset at 20:02. On the last day of the month, sunrise is at 07:21 and sunset at 19:06 CEST.
Sunshine
In September, the average sunshine is 9.6h.UV index
The average daily maximum UV index in September in Mendrisio is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Mendrisio?
What is the average humidity in September in Mendrisio?
How much does it rain in Mendrisio in September?
When it does not snow in Mendrisio?
Does it snow in Mendrisio in September?
How many hours of daylight does Mendrisio have in September?
When is the sunrise / sunset in September in Mendrisio?
How long on average sun shines in September in Mendrisio?
How high is the UV index in September in Mendrisio?
Average temperature in September
Mendrisio, Switzerland
- Average high temperature in September: 21°C
The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (15.2°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).
Average pressure in September
Mendrisio, 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
Mendrisio, Switzerland
- Average wind speed in September: 6.1km/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 (5.5km/h).
Average humidity in September
Mendrisio, Switzerland
- Average humidity in September: 74%
The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Mendrisio, Switzerland
- Average rainfall in September: 67mm
The wettest month (with the highest rainfall) is November (177mm).
The driest month (with the least rainfall) is January (31mm).
Average rainfall days in September
Mendrisio, Switzerland
- Average rainfall days in September: 15.4 days
The months with the highest number of rainy days are June and July (20.2 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Mendrisio, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (69mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Mendrisio, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mendrisio, 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 30min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Mendrisio, Switzerland
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is June (6 days).
Average UV index in September
Mendrisio, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Mendrisio, Switzerland
- Average cloud cover in September: 28
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
Mendrisio, 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).
