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
The advent of September brings a subtle shift in temperature, with the average high moving from a comfortable 18.5°C (65.3°F) in August to a still refreshing 14.3°C (57.7°F). Nightly temperatures in Les Allues drop to an average low of 4°C (39.2°F) in September.Humidity
The average relative humidity in September in Les Allues is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.7 days and typically collects 40mm (1.57") of precipitation.Snowfall
January through December are months with snowfall. In Les Allues, in September, during 1.4 snowfall days, 10mm (0.39") of snow is typically accumulated. In Les Allues, during the entire year, snow falls for 102.7 days and aggregates up to 3628mm (142.83") of snow.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 06:55 and sunset at 20:11. On the last day of the month, sunrise is at 07:31 and sunset at 19:15 CEST.
Sunshine
In Les Allues, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Les Allues?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
How much does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Les Allues have in September?
How high is the UV index in September?
Average temperature in September
Les Allues, France
- Average high temperature in September: 14.3°C
The warmest month (with the highest average high temperature) is August (18.5°C).
The month with the lowest average high temperature is January (-1.3°C).
- Average low temperature in September: 4°C
The month with the highest average low temperature is August (6.5°C).
The coldest months (with the lowest average low temperature) are January and February (-11.3°C).
Average pressure in September
Les Allues, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).
Average wind speed in September
Les Allues, France
- Average wind speed in September: 5.8km/h
The windiest month (with the highest average wind speed) is November (7.3km/h).
The calmest month (with the lowest average wind speed) is September (5.8km/h).
Average humidity in September
Les Allues, France
- Average humidity in September: 78%
The months with the highest relative humidity are February and March (88%).
The month with the lowest relative humidity is August (73%).
Average rainfall in September
Les Allues, France
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (121mm).
The driest month (with the least rainfall) is September (40mm).
Average rainfall days in September
Les Allues, France
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is June (22.3 days).
The month with the least rainy days is December (5.8 days).
Average snowfall in September
Les Allues, France
- Average snowfall in September: 10mm
The month with the highest snowfall is December (934mm).
The month with the least snowfall is July (1mm).
Average snowfall days in September
Les Allues, France
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is March (17.4 days).
The month with the least snowfall days is August (0.1 days).
Average daylight in September /
Average sunshine in September
Les Allues, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Les Allues, France
- Average sunshine days in September: 10 days
The month with the most sunshine days is October (17.2 days).
The months with the least sunshine days are May and June (4.3 days).
Average UV index in September
Les Allues, France
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Les Allues, France
- Average cloud cover in September: 34
The months with the most cloud cover are February and May (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Les Allues, France
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August, September, October and November (8km).
The months with the lowest visibility are January, February, March and December (7km).
