September weather forecastSonnaz, France
September
Weather in September
September, the first month of the autumn in Sonnaz, is also an enjoyable month, with an average temperature fluctuating between 8.5°C (47.3°F) and 19.9°C (67.8°F).Temperature
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 24.8°C (76.6°F) in August to a comfortable 19.9°C (67.8°F). Sonnaz experiences an average low-temperature of 8.5°C (47.3°F) in the month of September.Humidity
In Sonnaz, France, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Sonnaz, France. Rain falls for 12.5 days and accumulates 40mm (1.57") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 06:58 and sunset at 20:14. On the last day of the month, sunrise is at 07:33 and sunset at 19:18 CEST.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Sonnaz, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sonnaz, France
- Average high temperature in September: 19.9°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (11.6°C).
The coldest month (with the lowest average low temperature) is February (-2.9°C).
Average pressure in September
Sonnaz, 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
Sonnaz, France
- Average wind speed in September: 5.6km/h
The windiest month (with the highest average wind speed) is March (7.2km/h).
The calmest months (with the lowest average wind speed) are August and September (5.6km/h).
Average humidity in September
Sonnaz, France
- Average humidity in September: 78%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Sonnaz, France
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (117mm).
The driest month (with the least rainfall) is September (40mm).
Average rainfall days in September
Sonnaz, France
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is October (10.6 days).
Average snowfall in September
Sonnaz, France
- Average snowfall in September: 0mm
The month with the highest snowfall is February (57mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sonnaz, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sonnaz, 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 54min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Sonnaz, France
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (18.5 days).
The months with the least sunshine days are May and June (8.1 days).
Average UV index in September
Sonnaz, 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
Sonnaz, France
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Sonnaz, France
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, June, July, August and November (9km).
The months with the lowest visibility are January, May, September, October and December (8km).
