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
As September begins, there is a minor decrease in the average high-temperature, softly falling from an agreeable 22.3°C (72.1°F) in August to a comfortable 18.3°C (64.9°F). During the month of September, the nighttime temperature falls to an average of 9.2°C (48.6°F).Humidity
In September, the average relative humidity is 79%.Rainfall
The month with the least rainfall in Ballaison is September, when the rain falls for 13.5 days and typically collects 42mm (1.65") of precipitation.Snowfall
In Ballaison, snow does not fall in June through September.Daylight
The average length of the day in September in Ballaison, France, is 12h and 32min.On the first day of the month, sunrise is at 06:55 and sunset at 20:13. On the last day of September, in Ballaison, sunrise is at 07:32 and sunset at 19:16 CEST.
Sunshine
In Ballaison, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September in Ballaison is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Ballaison in September?
What is the average humidity in September in Ballaison?
What is the driest month in Ballaison?
How much does it rain in Ballaison in September?
When it does not snow in Ballaison?
Does it snow in Ballaison in September?
How many hours of daylight does Ballaison have in September?
When are sunrise and sunset in September in Ballaison?
How long on average sun shines in September in Ballaison?
What is the UV index intensity in September in Ballaison?
Average temperature in September
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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
Ballaison, France
- 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).
