This report describes the typical weather at the Paris Le Bourget Airport (Paris, France) weather station over the course of an average May. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Paris has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (68%), built-up areas (18%), forests (7%), and grasslands (7%).
The month of May is characterized by rising daily high temperatures, with daily highs increasing from 63°F to 69°F over the course of the month, exceeding 78°F or dropping below 53°F only one day in ten.
Over the course of May, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:16 hours, implying an average day-over-day increase of 2.5 minutes.
The shortest day of the month is May 1 with 14:37 hours of daylight; the longest day is May 31 with 15:54 hours of daylight.
The earliest sunrise is at 5:51am on May 31; the latest sunset is at 9:45pm on May 31; the latest sunrise is at 6:28am on May 1; the earliest sunset is at 9:06pm on May 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in May, so the entire month is in daylight time.
The median cloud cover is 70% (partly cloudy) and does not vary substantially over the course of the month.
On May 16, a representative day, the sky is clear or mostly clear 20% of the time, partly cloudy 18% of the time, and mostly cloudy or overcast 30% of the time.
The average probability that some form of precipitation will be observed in a given day is 46%, with little variation over the course of the month.
Throughout May, the most common forms of precipitation are moderate rain, light rain, and thunderstorms.
Moderate rain is the most severe precipitation observed during 52% of those days with precipitation. It is most likely around May 3, when it is observed during 26% of all days.
Light rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around May 8, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 21% of those days with precipitation. They are most likely around May 30, when it is observed during 10% of all days.
Either snow is exceptionally unlikely to fall at this location in May or this station does not reliably report precipitation types.
The relative humidity typically ranges from 52% (mildly humid) to 95% (very humid) over the course of a typical May, rarely dropping below 36% (comfortable) and reaching as high as 100% (very humid).
The air is driest around May 22, at which time the relative humidity drops below 60% (mildly humid) three days out of four; it is most humid around May 7, rising above 92% (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 May, the dew point typically varies from 40°F (dry) to 55°F (very comfortable) and is rarely below 33°F (dry) or above 63°F (mildy humid).
The time of the month between May 7 and May 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of May typical wind speeds vary from 2 mph to 15 mph (light air to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around May 2, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around May 23, at which time the average daily maximum wind speed is 13 mph (moderate breeze).