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
In September, the meteorological conditions change slightly, with the average high-temperature moving from an agreeable 22.3°C (72.1°F) in August to an enjoyable 18.3°C (64.9°F). September nights are marked by an average temperature drop to a chilly 9.2°C (48.6°F).Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall in Saint-Prex, Switzerland. Rain falls for 13.5 days and accumulates 42mm (1.65") of precipitation.Snowfall
June through September are months without snowfall in Saint-Prex.Daylight
In Saint-Prex, Switzerland, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 06:54 and sunset at 20:13. On the last day of September, sunrise is at 07:32 and sunset at 19:15 CEST.
Sunshine
In Saint-Prex, the average sunshine in September is 9.1h.UV index
In Saint-Prex, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Saint-Prex in September?
What is the average humidity in September in Saint-Prex?
What is the driest month in Saint-Prex?
How many days does it rain in September in Saint-Prex?
When it does not snow in Saint-Prex?
Does it snow in Saint-Prex in September?
How many hours of daylight does Saint-Prex have in September?
When are sunrise and sunset in September in Saint-Prex?
How many hours of sunshine does Saint-Prex have in September?
How high is the UV index in September in Saint-Prex?
Average temperature in September
Saint-Prex, Switzerland
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is August (22.3°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in September: 9.2°C
The months with the highest average low temperature are July and August (12.3°C).
The coldest month (with the lowest average low temperature) is February (-2.8°C).
Average pressure in September
Saint-Prex, Switzerland
- Average pressure in September: 1018.5mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Saint-Prex, Switzerland
- Average wind speed in September: 8km/h
The windiest month (with the highest average wind speed) is February (11.2km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Saint-Prex, Switzerland
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Saint-Prex, Switzerland
- Average rainfall in September: 42mm
The wettest month (with the highest rainfall) is December (103mm).
The driest month (with the least rainfall) is September (42mm).
Average rainfall days in September
Saint-Prex, Switzerland
- Average rainfall days in September: 13.5 days
The months with the highest number of rainy days are May and June (20.4 days).
The month with the least rainy days is October (11.5 days).
Average snowfall in September
Saint-Prex, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (98mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Saint-Prex, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint-Prex, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Saint-Prex, Switzerland
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (7.3 days).
Average UV index in September
Saint-Prex, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Saint-Prex, Switzerland
- Average cloud cover in September: 29
The months with the most cloud cover are January and December (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Saint-Prex, 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).
