September weather forecastSillans, France
September
Weather in September
September, the first month of the autumn in Sillans, is still a pleasant month, with an average temperature varying between 20.5°C (68.9°F) and 10.1°C (50.2°F).Temperature
As August makes way for September, Sillans's average high-temperature eases from a moderately hot 25.1°C (77.2°F) to a pleasant 20.5°C (68.9°F). September's nights observe an average temperature of 10.1°C (50.2°F).Humidity
The average relative humidity in September in Sillans is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 34mm (1.34") of precipitation.Snowfall
June through September are months without snowfall in Sillans.Daylight
In Sillans, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 07:00 and sunset at 20:15. On the last day of the month, sunrise is at 07:35 and sunset at 19:20 CEST.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September in Sillans is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sillans, France
- Average high temperature in September: 20.5°C
The warmest month (with the highest average high temperature) is August (25.1°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 10.1°C
The month with the highest average low temperature is July (13.2°C).
The coldest month (with the lowest average low temperature) is January (-1.2°C).
Average pressure in September
Sillans, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1021mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Sillans, France
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is February (10.5km/h).
The calmest month (with the lowest average wind speed) is September (7.7km/h).
Average humidity in September
Sillans, France
- Average humidity in September: 79%
The months with the highest relative humidity are January, November and December (85%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Sillans, France
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is November (67mm).
The driest month (with the least rainfall) is September (34mm).
Average rainfall days in September
Sillans, France
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is August (11 days).
Average snowfall in September
Sillans, France
- Average snowfall in September: 0mm
The month with the highest snowfall is November (92mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sillans, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sillans, France
- Average daylight in September: 12h and 30min
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 30min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Sillans, France
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is August (16.8 days).
The month with the least sunshine days is May (9.5 days).
Average UV index in September
Sillans, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sillans, France
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Sillans, 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).
