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
Weather in September
Temperature
September's arrival signals a moderate reduction in the average high-temperature, easing from a warm 23.6°C (74.5°F) in August to a refreshing 19°C (66.2°F). The average low-temperature during September nights is a chilly 7.8°C (46°F).Humidity
In Annecy-le-Vieux, the average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 14.8 days and accumulates 47mm (1.85") of precipitation.Snowfall
Months with snowfall in Annecy-le-Vieux are January through May, September through December. September is the first month it typically snows in Annecy-le-Vieux. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, there are 29.1 snowfall days, and 619mm (24.37") of snow is accumulated.Daylight
The average length of the day in September in Annecy-le-Vieux, France, is 12h and 32min.On the first day of the month, sunrise is at 06:56 and sunset at 20:13. On the last day of September, in Annecy-le-Vieux, sunrise is at 07:33 and sunset at 19:17 CEST.
Sunshine
In Annecy-le-Vieux, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prevention - Warding off sunburn is urged. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the usual temperature for Annecy-le-Vieux in September?
What is the average humidity in September in Annecy-le-Vieux?
What is the driest month in Annecy-le-Vieux?
How much does it rain in Annecy-le-Vieux in September?
When does it start snowing in Annecy-le-Vieux?
How many hours of daylight does Annecy-le-Vieux have in September?
What time are sunrise and sunset in September in Annecy-le-Vieux?
How long on average sun shines in September in Annecy-le-Vieux?
How high is the UV index in September in Annecy-le-Vieux?
Average temperature in September
Annecy-le-Vieux, France
- Average high temperature in September: 19°C
The warmest month (with the highest average high temperature) is August (23.6°C).
The month with the lowest average high temperature is January (3.1°C).
- Average low temperature in September: 7.8°C
The month with the highest average low temperature is August (11°C).
The coldest month (with the lowest average low temperature) is February (-4°C).
Average pressure in September
Annecy-le-Vieux, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Annecy-le-Vieux, France
- Average wind speed in September: 5.9km/h
The windiest months (with the highest average wind speed) are February and March (7.5km/h).
The calmest month (with the lowest average wind speed) is August (5.7km/h).
Average humidity in September
Annecy-le-Vieux, France
- Average humidity in September: 79%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Annecy-le-Vieux, France
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is December (119mm).
The driest month (with the least rainfall) is September (47mm).
Average rainfall days in September
Annecy-le-Vieux, France
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is October (11.6 days).
Average snowfall in September
Annecy-le-Vieux, France
- Average snowfall in September: 1mm
The month with the highest snowfall is December (171mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Annecy-le-Vieux, France
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Annecy-le-Vieux, 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: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Annecy-le-Vieux, France
- 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 June (7.6 days).
Average UV index in September
Annecy-le-Vieux, 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
Annecy-le-Vieux, France
- Average cloud cover in September: 32
The months with the most cloud cover are January and December (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Annecy-le-Vieux, France
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are January, February, May, June, July, September, October, November and December (8km).
Annecy-le-Vieux, France
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