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
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a warm 24.3°C (75.7°F) to an agreeable 20.7°C (69.3°F). An average nighttime temperature of 11.3°C (52.3°F) is witnessed in Silly-le-Long throughout September.Humidity
In Silly-le-Long, the average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall in Silly-le-Long. Rain falls for 12.5 days and accumulates 28mm (1.1") of precipitation.Snowfall
April through October are months without snowfall in Silly-le-Long.Daylight
The average length of the day in September is 12h and 35min.On the first day of September in Silly-le-Long, sunrise is at 07:06 and sunset at 20:31. On the last day of the month, sunrise is at 07:47 and sunset at 19:29 CEST.
Sunshine
In September, the average sunshine is 7.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 in September translates into these instructions:
Take precautions - Protection against sunburn is recommended. Minimize direct exposure to the Sun during midday when its radiation is at its peak. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Silly-le-Long?
What is the average humidity in September in Silly-le-Long?
What is the driest month in Silly-le-Long?
How many days does it rain in September in Silly-le-Long?
When it does not snow in Silly-le-Long?
How many hours of daylight does Silly-le-Long have in September?
What time are sunrise and sunset in September in Silly-le-Long?
How many hours of sunshine does Silly-le-Long have in September?
What is the UV index reading in September in Silly-le-Long?
Average temperature in September
Silly-le-Long, France
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is August (24.3°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (1.2°C).
Average pressure in September
Silly-le-Long, France
- Average pressure in September: 1018.1mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in September
Silly-le-Long, France
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is February (15.9km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).
Average humidity in September
Silly-le-Long, France
- Average humidity in September: 74%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (71%).
Average rainfall in September
Silly-le-Long, France
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is December (65mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in September
Silly-le-Long, France
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is September (12.5 days).
Average snowfall in September
Silly-le-Long, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (33mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Silly-le-Long, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Silly-le-Long, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Silly-le-Long, France
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Silly-le-Long, 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
Silly-le-Long, France
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 38).
Average visibility in September
Silly-le-Long, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, November and December (8km).
