This report describes the typical weather at the Avignon Caumont Airport (Avignon, France) weather station over the course of an average September. It is based on the historical records from 2006 to 2012. Earlier records are either unavailable or unreliable.
Avignon has a mediterranean climate with dry hot summers and mild winters. The area within 25 mi of this station is covered by croplands (91%) and forests (7%).
The month of September is characterized by falling daily high temperatures, with daily highs ranging from 84°F to 75°F over the course of the month, exceeding 90°F or dropping below 69°F only one day in ten.
Over the course of September, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:26 hours, implying an average day-over-day decrease of 2.9 minutes.
The shortest day of the month is September 30 with 11:46 hours of daylight; the longest day is September 1 with 13:12 hours of daylight.
The earliest sunrise is at 7:04am on September 1; the latest sunset is at 8:15pm on September 1; the latest sunrise is at 7:37am on September 30; the earliest sunset is at 7:23pm on September 30.
Daylight saving time is observed in 2012 but it neither starts nor ends in September, so the entire month is in daylight time.
The median cloud cover ranges from 67% (partly cloudy) to 74% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 7% from the start to the end of the month.
On September 15, a representative day, the sky is clear or mostly clear 7% of the time, partly cloudy 4% of the time, and mostly cloudy or overcast 14% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around September 30, occurring in 27% of days. Precipitation is least likely around September 2, occurring in 22% of days.
Throughout September, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around September 11, when it is observed during 11% of all days.
Thunderstorms are the most severe precipitation observed during 27% of those days with precipitation. They are most likely around September 1, when it is observed during 8% of all days.
Moderate rain is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around September 29, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in September or this station does not reliably report precipitation types.
The relative humidity typically ranges from 36% (comfortable) to 90% (very humid) over the course of a typical September, rarely dropping below 27% (dry) and reaching as high as 98% (very humid).
The air is driest around September 1, at which time the relative humidity drops below 42% (comfortable) three days out of four; it is most humid around September 30, rising above 87% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical September, the dew point typically varies from 49°F (dry) to 61°F (comfortable) and is rarely below 42°F (dry) or above 68°F (muggy).
The time of the month between September 1 and September 30 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of September typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around September 5, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around September 26, at which time the average daily maximum wind speed is 12 mph (moderate breeze).