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
September brings a slight decrease in temperature, down from a pleasant 22.3°C (72.1°F) in August to a refreshing 18.5°C (65.3°F). During September, the temperature in Clairfontaine tends to dip to an average of 9.5°C (49.1°F) at night.Humidity
In Clairfontaine, France, the average relative humidity in September is 81%.Rainfall
In Clairfontaine, during September, the rain falls for 12.8 days and regularly aggregates up to 38mm (1.5") of precipitation. In Clairfontaine, France, during the entire year, the rain falls for 190 days and collects up to 635mm (25") of precipitation.Snowfall
May through September are months without snowfall in Clairfontaine, France.Daylight
The average length of the day in September in Clairfontaine, France, is 12h and 37min.On the first day of the month, sunrise is at 06:59 and sunset at 20:27. On the last day of September, in Clairfontaine, France, sunrise is at 07:43 and sunset at 19:24 CEST.
Sunshine
In Clairfontaine, the average sunshine in September is 7.7h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Guard yourself - Avoiding sunburn is suggested. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What is the usual temperature for Clairfontaine in September?
What is the average humidity in September in Clairfontaine?
How many days does it rain in September in Clairfontaine?
When it does not snow in Clairfontaine?
Does it snow in Clairfontaine in September?
What is the average length of the day in September in Clairfontaine?
When are sunrise and sunset in September in Clairfontaine?
How long on average sun shines in September in Clairfontaine?
What is the UV index intensity in September in Clairfontaine?
Average temperature in September
Clairfontaine, France
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (22.3°C).
The month with the lowest average high temperature is January (3.9°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-0.1°C).
Average pressure in September
Clairfontaine, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in September
Clairfontaine, France
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is February (15.8km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Clairfontaine, France
- Average humidity in September: 81%
The month with the highest relative humidity is December (92%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Clairfontaine, France
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is December (80mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in September
Clairfontaine, France
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is December (18.4 days).
The month with the least rainy days is September (12.8 days).
Average snowfall in September
Clairfontaine, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (56mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Clairfontaine, France
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clairfontaine, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Clairfontaine, France
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in September
Clairfontaine, 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
Clairfontaine, France
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Clairfontaine, France
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are January, February, May, June, July, September, October, November and December (8km).
Clairfontaine, France
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