September weather forecastSionne, France
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Sionne, France, with an average temperature fluctuating between 9.8°C (49.6°F) and 19.4°C (66.9°F).Temperature
In the transition to September, Sionne observes a minor drop in the average high-temperature, shifting from a warm 23.3°C (73.9°F) in August to a refreshing 19.4°C (66.9°F). Sionne reports an average nighttime low-temperature of 9.8°C (49.6°F) in September.Humidity
The average relative humidity in September in Sionne, France, is 79%.Rainfall
The months with the least rainfall in Sionne are April, September and October Rain falls for 10.6 days and accumulates 34mm (1.34") of rain.Snowfall
In Sionne, snow does not fall in April, June through September.Daylight
In September, the average length of the day is 12h and 35min.On the first day of the month, sunrise is at 06:55 and sunset at 20:18. On the last day of September, in Sionne, sunrise is at 07:36 and sunset at 19:18 CEST.
Sunshine
In September, the average sunshine in Sionne is 8h.UV index
The average daily maximum UV index in September in Sionne is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Take precautions - Protection against sun damage is advised. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sionne, France
- Average high temperature in September: 19.4°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 (3.8°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in September
Sionne, France
- Average pressure in September: 1018.1mbar
The month with the highest atmospheric pressure is December (1019.1mbar).
The month with the lowest atmospheric pressure is November (1014.4mbar).
Average wind speed in September
Sionne, France
- Average wind speed in September: 10.7km/h
The windiest months (with the highest average wind speed) are February and December (16.4km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).
Average humidity in September
Sionne, France
- Average humidity in September: 79%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Sionne, France
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is December (75mm).
The driest months (with the least rainfall) are April, September and October (34mm).
Average rainfall days in September
Sionne, France
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is September (10.6 days).
Average snowfall in September
Sionne, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (70mm).
The months with the least snowfall are April, June, July, August and September (0mm).
Average snowfall days in September
Sionne, 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
Sionne, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Sionne, France
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is June (9.9 days).
Average UV index in September
Sionne, 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
Sionne, France
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Sionne, France
- Average visibility in September: 8km
The months with the highest visibility are March, April, July and August (9km).
The months with the lowest visibility are January, February, May, June, September, October, November and December (8km).
