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
Clayes's entry into September measures an average high-temperature of a pleasant 20.8°C (69.4°F), closely parallel to the preceding month. Throughout September nights, Clayes experiences a consistent temperature average of 10.8°C (51.4°F).Humidity
July through September, with an average relative humidity of 78%, are the least humid months.Rainfall
September is the month with the least rainfall in Clayes. Rain falls for 8.4 days and accumulates 12mm (0.47") of precipitation.Snowfall
In Clayes, snow does not fall in May through October.Daylight
In Clayes, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 07:25 and sunset at 20:48. On the last day of the month, sunrise is at 08:06 and sunset at 19:48 CEST.
Sunshine
In Clayes, the average sunshine in September is 7.5h.UV index
The average daily maximum UV index in September in Clayes is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are September temperatures in Clayes?
What is the least humid month in Clayes?
What is the average humidity in September in Clayes?
What is the driest month in Clayes?
How many days does it rain in September in Clayes?
When it does not snow in Clayes?
How many hours of daylight does Clayes have in September?
When are sunrise and sunset in September in Clayes?
How long on average sun shines in September in Clayes?
What is the UV index intensity in September in Clayes?
Average temperature in September
Clayes, France
- Average high temperature in September: 20.8°C
The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is July (12.8°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Clayes, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1012.9mbar).
Average wind speed in September
Clayes, France
- Average wind speed in September: 12.1km/h
The windiest month (with the highest average wind speed) is February (17.6km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Clayes, France
- Average humidity in September: 78%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are July, August and September (78%).
Average rainfall in September
Clayes, France
- Average rainfall in September: 12mm
The wettest month (with the highest rainfall) is June (39mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in September
Clayes, France
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is September (8.4 days).
Average snowfall in September
Clayes, France
- Average snowfall in September: 0mm
The months with the highest snowfall are February, March, April and December (2mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Clayes, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Clayes, France
- Average daylight in September: 12h and 4min
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: 7h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Clayes, 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 May (12.1 days).
Average UV index in September
Clayes, 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
Clayes, France
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 41).
Average visibility in September
Clayes, France
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, June, July, October, November and December (9km).
The months with the lowest visibility are May, August and September (8km).
Clayes, France
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