September weather forecastGrignan, France
September
Weather in September
September, the first month of the autumn in Grignan, is also a moderately hot month, with an average temperature fluctuating between 12.2°C (54°F) and 23.3°C (73.9°F).Temperature
In Grignan, the average high-temperature in September decreases from 28.5°C (83.3°F) in August to a still moderately hot 23.3°C (73.9°F). Grignan observes an average low-temperature of 12.2°C (54°F) during September.Humidity
The average relative humidity in September is 69%.Rainfall
In Grignan, during September, the rain falls for 7 days and regularly aggregates up to 19mm (0.75") of precipitation. Throughout the year, in Grignan, there are 111.4 rainfall days, and 380mm (14.96") of precipitation is accumulated.Snowfall
April through November are months without snowfall in Grignan.Daylight
In Grignan, France, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 07:03 and sunset at 20:16. On the last day of the month, sunrise is at 07:37 and sunset at 19:22 CEST.
Sunshine
In Grignan, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September in Grignan is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grignan, France
- Average high temperature in September: 23.3°C
The warmest month (with the highest average high temperature) is July (28.8°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 12.2°C
The months with the highest average low temperature are July and August (15.5°C).
The coldest month (with the lowest average low temperature) is February (0.8°C).
Average pressure in September
Grignan, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Grignan, France
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is May (11.9km/h).
The calmest month (with the lowest average wind speed) is November (9.5km/h).
Average humidity in September
Grignan, France
- Average humidity in September: 69%
The month with the highest relative humidity is November (83%).
The months with the lowest relative humidity are July and August (62%).
Average rainfall in September
Grignan, France
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (83mm).
The driest month (with the least rainfall) is July (16mm).
Average rainfall days in September
Grignan, France
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is November (12.5 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in September
Grignan, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (7mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Grignan, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and November (0 days).
Average daylight in September /
Average sunshine in September
Grignan, France
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is November (Average sunshine: 5h and 42min).
Average sunshine days in September
Grignan, France
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is August (22.7 days).
The month with the least sunshine days is November (15.6 days).
Average UV index in September
Grignan, France
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Grignan, France
- Average cloud cover in September: 21
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Grignan, France
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (9km).
