September weather forecastLe Grais, France
September
Weather in September
September, the first month of the autumn in Le Grais, is still a refreshing month, with an average temperature fluctuating between 19.9°C (67.8°F) and 10°C (50°F).Temperature
The arrival of September brings an average high-temperature of a comfortable 19.9°C (67.8°F), closely following the temperature pattern of August. Throughout September, the average low-temperature in Le Grais dips to a cool 10°C (50°F).Humidity
In September, the average relative humidity is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 28mm (1.1") of precipitation.Snowfall
In Le Grais, snow does not fall in May through October.Daylight
In Le Grais, France, the average length of the day in September is 12h and 35min.On the first day of the month, sunrise is at 07:19 and sunset at 20:43. On the last day of September, sunrise is at 08:00 and sunset at 19:42 CEST.
Sunshine
In September, the average sunshine is 7.2h.UV index
In Le Grais, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Le Grais, France
- Average high temperature in September: 19.9°C
The warmest month (with the highest average high temperature) is August (22.6°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 10°C
The months with the highest average low temperature are July and August (12.4°C).
The coldest month (with the lowest average low temperature) is February (1.2°C).
Average pressure in September
Le Grais, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).
Average wind speed in September
Le Grais, France
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is February (17.1km/h).
The calmest month (with the lowest average wind speed) is August (10.6km/h).
Average humidity in September
Le Grais, France
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (90%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Le Grais, France
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is June (65mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in September
Le Grais, France
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is September (12.4 days).
Average snowfall in September
Le Grais, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (32mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Le Grais, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Le Grais, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Le Grais, France
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is September (14.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in September
Le Grais, 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
Le Grais, France
- Average cloud cover in September: 44
The month with the most cloud cover is November (Cloud cover 65).
The month with the least cloud cover is September (Cloud cover 44).
Average visibility in September
Le Grais, France
- Average visibility in September: 8km
The months with the highest visibility are February and March (9km).
The months with the lowest visibility are January, April, May, June, July, August, September, October, November and December (8km).
