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
The shift from August to September coincides with a small decrease in the average high-temperature, down to an agreeable 20°C (68°F) from a warm 24.2°C (75.6°F). September nights are marked by an average temperature drop to a frosty 9.5°C (49.1°F).Humidity
The average relative humidity in September in Authoison is 81%.Rainfall
September is the month with the least rainfall in Authoison. Rain falls for 11.5 days and accumulates 30mm (1.18") of precipitation.Snowfall
In Authoison, France, snow does not fall in April through September.Daylight
In Authoison, the average length of the day in September is 12h and 34min.On the first day of September in Authoison, sunrise is at 06:54 and sunset at 20:15. On the last day of the month, sunrise is at 07:33 and sunset at 19:16 CEST.
Sunshine
In September, the average sunshine in Authoison is 8.6h.UV index
In Authoison, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What are September temperatures in Authoison?
What is the average humidity in September in Authoison?
What is the driest month in Authoison?
How much does it rain in Authoison in September?
When it does not snow in Authoison?
Does it snow in Authoison in September?
What is the average length of the day in September in Authoison?
What time are sunrise and sunset in September in Authoison?
How long on average sun shines in September in Authoison?
What is the UV index intensity in September in Authoison?
Average temperature in September
Authoison, France
- Average high temperature in September: 20°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is January (4.2°C).
- Average low temperature in September: 9.5°C
The months with the highest average low temperature are July and August (13°C).
The coldest month (with the lowest average low temperature) is January (-0.5°C).
Average pressure in September
Authoison, France
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is November (1015.4mbar).
Average wind speed in September
Authoison, France
- Average wind speed in September: 8.7km/h
The windiest month (with the highest average wind speed) is February (13.1km/h).
The calmest month (with the lowest average wind speed) is August (7.9km/h).
Average humidity in September
Authoison, France
- Average humidity in September: 81%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Authoison, France
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is September (30mm).
Average rainfall days in September
Authoison, France
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is September (11.5 days).
Average snowfall in September
Authoison, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (81mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Authoison, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Authoison, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Authoison, France
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is October (16.9 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in September
Authoison, 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
Authoison, France
- Average cloud cover in September: 34
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Authoison, France
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, July and August (9km).
The months with the lowest visibility are January, May, June, September, October, November and December (8km).
Authoison, France
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