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 commencement of September in Saint-Étienne, France, indicates a gentle shift in the average high-temperature, receding from August's moderately hot 24.9°C (76.8°F) to an agreeable 20.3°C (68.5°F). An average low-temperature of 9.9°C (49.8°F) is expected during September.Humidity
In Saint-Étienne, the average relative humidity in September is 77%.Rainfall
In Saint-Étienne, France, in September, it is raining for 11 days, with typically 28mm (1.1") of accumulated precipitation. In Saint-Étienne, during the entire year, the rain falls for 153.4 days and collects up to 511mm (20.12") 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 the month, sunrise is at 07:04 and sunset at 20:20. On the last day of September, in Saint-Étienne, France, sunrise is at 07:40 and sunset at 19:24 CEST.
Sunshine
In September, the average sunshine in Saint-Étienne, France, is 8.1h.UV index
The average daily maximum UV index in September in Saint-Étienne is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What are the temperatures in Saint-Étienne in September?
What is the average humidity in September in Saint-Étienne?
How much does it rain in Saint-Étienne in September?
When it does not snow in Saint-Étienne?
Does it snow in Saint-Étienne in September?
How many hours of daylight does Saint-Étienne have in September?
When is the sunrise / sunset in September in Saint-Étienne?
How long on average sun shines in September in Saint-Étienne?
How high is the UV index in September in Saint-Étienne?
Average temperature in September
Saint-Étienne, France
- Average high temperature in September: 20.3°C
The warmest month (with the highest average high temperature) is August (24.9°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 9.9°C
The month with the highest average low temperature is July (13.2°C).
The coldest month (with the lowest average low temperature) is February (-1°C).
Average pressure in September
Saint-Étienne, France
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021.3mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Saint-Étienne, France
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is February (12.5km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).
Average humidity in September
Saint-Étienne, France
- Average humidity in September: 77%
The months with the highest relative humidity are November and December (86%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Saint-Étienne, France
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is November (58mm).
The driest month (with the least rainfall) is February (27mm).
Average rainfall days in September
Saint-Étienne, France
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is December (10 days).
Average snowfall in September
Saint-Étienne, France
- Average snowfall in September: 0mm
The month with the highest snowfall is November (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Saint-Étienne, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint-Étienne, France
- Average daylight in September: 12h and 3min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Saint-Étienne, France
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is August (18.3 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in September
Saint-Étienne, 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
Saint-Étienne, France
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Saint-Étienne, 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).
Saint-Étienne, France
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