September weather forecastGrattery, France
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Grattery, France, with temperature in the range of an average low of 9.5°C (49.1°F) and an average high of 20°C (68°F).Temperature
With the onset of September, Grattery's climate undergoes a slight change as the average high-temperature moves from a warm 24.2°C (75.6°F) in August to a pleasant 20°C (68°F). September's average low-temperature reading settles at a chilly 9.5°C (49.1°F).Humidity
The average relative humidity in September is 81%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 30mm (1.18") of precipitation.Snowfall
In Grattery, snow does not fall in April through September.Daylight
In Grattery, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 06:54 and sunset at 20:16. On the last day of the month, sunrise is at 07:34 and sunset at 19:16 CEST.
Sunshine
In September, the average sunshine in Grattery is 8.6h.UV index
In Grattery, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grattery, France
- Average high temperature in September: 20°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is January (4.2°C).
- Average low temperature in September: 9.5°C
The months with the highest average low temperature are July and August (13°C).
The coldest month (with the lowest average low temperature) is January (-0.5°C).
Average pressure in September
Grattery, France
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is November (1015.4mbar).
Average wind speed in September
Grattery, France
- Average wind speed in September: 8.7km/h
The windiest month (with the highest average wind speed) is February (13.1km/h).
The calmest month (with the lowest average wind speed) is August (7.9km/h).
Average humidity in September
Grattery, France
- Average humidity in September: 81%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Grattery, France
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is September (30mm).
Average rainfall days in September
Grattery, France
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is September (11.5 days).
Average snowfall in September
Grattery, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (81mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Grattery, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grattery, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Grattery, France
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is October (16.9 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in September
Grattery, 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
Grattery, France
- Average cloud cover in September: 34
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Grattery, France
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, July and August (9km).
The months with the lowest visibility are January, May, June, September, October, November and December (8km).
