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
September is marked by a subtle drop in average high-temperatures, transitioning from a comfortable 16.2°C (61.2°F) in August to a fresh 12°C (53.6°F). September witnesses an average low-temperature hovering around a wintry 2.8°C (37°F).Humidity
The average relative humidity in September is 82%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.1 days and typically collects 43mm (1.69") of precipitation.Snowfall
January through May, August through December are months with snowfall. In Champex, in September, snow falls for 1.2 days, with typically accumulated 12mm (0.47") of snow. In Champex, during the entire year, snow falls for 97.6 days and aggregates up to 2767mm (108.94") of snow.Daylight
In Champex, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 06:52 and sunset at 20:09. On the last day of the month, sunrise is at 07:29 and sunset at 19:13 CEST.
Sunshine
In September, the average sunshine is 8.2h.UV index
In Champex, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 2 translates into these guidelines:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
How many days does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Champex, Switzerland
- Average high temperature in September: 12°C
The warmest month (with the highest average high temperature) is August (16.2°C).
The month with the lowest average high temperature is January (-2.9°C).
- Average low temperature in September: 2.8°C
The months with the highest average low temperature are July and August (5.6°C).
The coldest month (with the lowest average low temperature) is January (-12.3°C).
Average pressure in September
Champex, Switzerland
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Champex, Switzerland
- Average wind speed in September: 6.7km/h
The windiest months (with the highest average wind speed) are November and December (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6.5km/h).
Average humidity in September
Champex, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is March (91%).
The month with the lowest relative humidity is August (79%).
Average rainfall in September
Champex, Switzerland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is May (117mm).
The driest month (with the least rainfall) is September (43mm).
Average rainfall days in September
Champex, Switzerland
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is May (21.2 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in September
Champex, Switzerland
- Average snowfall in September: 12mm
The month with the highest snowfall is December (669mm).
The months with the least snowfall are June and July (0mm).
Average snowfall days in September
Champex, Switzerland
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is January (18.5 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Champex, 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: 8h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and December (Average sunshine: 4h and 42min).
Average sunshine days in September
Champex, Switzerland
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is May (6.3 days).
Average UV index in September
Champex, Switzerland
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Champex, Switzerland
- Average cloud cover in September: 42
The months with the most cloud cover are February, March and May (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Champex, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are June, July, August and October (8km).
The months with the lowest visibility are January, February and March (6km).
