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 witnesses a gentle descent in average high-temperature, descending from August's warm 23.3°C (73.9°F) to a comfortable 18.9°C (66°F). In September, the average low-temperature records at a chilly 7.4°C (45.3°F) during the nights.Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 12.1 days. Throughout September, 35mm (1.38") of precipitation is accumulated. Throughout the year, there are 157.7 rainfall days, and 532mm (20.94") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. In Alleyras, during the entire year, snow falls for 56.9 days and aggregates up to 652mm (25.67") of snow.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 07:08 and sunset at 20:22. On the last day of the month, sunrise is at 07:42 and sunset at 19:27 CEST.
Sunshine
The average sunshine in September in Alleyras is 8.3h.UV index
In Alleyras, France, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the usual temperature for Alleyras in September?
What is the average humidity in September in Alleyras?
How much does it rain in Alleyras in September?
When does it start snowing in Alleyras?
What is the average length of the day in September in Alleyras?
When are sunrise and sunset in September in Alleyras?
How long on average sun shines in September in Alleyras?
What is the UV index reading in September in Alleyras?
Average temperature in September
Alleyras, France
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (3.4°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is August (10.7°C).
The coldest month (with the lowest average low temperature) is February (-3°C).
Average pressure in September
Alleyras, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1021.3mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Alleyras, France
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is February (12.7km/h).
The calmest month (with the lowest average wind speed) is August (8.2km/h).
Average humidity in September
Alleyras, France
- Average humidity in September: 78%
The months with the highest relative humidity are January, November and December (87%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Alleyras, France
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is November (64mm).
The driest month (with the least rainfall) is February (28mm).
Average rainfall days in September
Alleyras, France
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in September
Alleyras, France
- Average snowfall in September: 1mm
The month with the highest snowfall is February (137mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Alleyras, France
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Alleyras, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Alleyras, France
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (15.4 days).
The month with the least sunshine days is May (8.5 days).
Average UV index in September
Alleyras, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Alleyras, France
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Alleyras, France
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and December (8km).
The months with the lowest visibility are January and November (7km).
Alleyras, France
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