This report describes the typical weather at the Bucharest "Aurel Vlaicu" Vlaicu International Airport (Bucharest, Romania) weather station over the course of an average July. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Bucharest has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (73%), grasslands (23%), and built-up areas (3%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 84°F throughout the month, exceeding 93°F or dropping below 73°F only one day in ten.
Over the course of July, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 48 minutes, implying an average day-over-day decrease of 1.5 minutes.
The shortest day of the month is July 31 with 14:40 hours of daylight; the longest day is July 1 with 15:28 hours of daylight.
The earliest sunrise is at 5:35am on July 1; the latest sunset is at 9:04pm on July 3; the latest sunrise is at 6:02am on July 31; the earliest sunset is at 8:42pm on July 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover ranges from 30% (mostly clear) to 39% (mostly clear). The trend is for the sky to be clearing with the median cloud cover decreasing by 9% from the start to the end of the month.
On July 16, a representative day, the sky is clear or mostly clear 48% of the time, partly cloudy 20% of the time, and mostly cloudy or overcast 18% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around July 1, occurring in 49% of days. Precipitation is least likely around July 31, occurring in 40% of days.
Throughout July, the most common forms of precipitation are thunderstorms and moderate rain.
Thunderstorms are the most severe precipitation observed during 62% of those days with precipitation. They are most likely around July 1, when it is observed during 31% of all days.
Moderate rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around July 2, when it is observed during 13% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 41% (comfortable) to 97% (very humid) over the course of a typical July, rarely dropping below 27% (dry) and reaching as high as 100% (very humid).
The air is driest around July 23, at which time the relative humidity drops below 46% (comfortable) three days out of four; it is most humid around July 21, rising above 99% (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 July, the dew point typically varies from 54°F (very comfortable) to 67°F (muggy) and is rarely below 46°F (dry) or above 72°F (very muggy).
Over the course of July typical wind speeds vary from 0 mph to 10 mph (calm to gentle breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 4 mph (light breeze) occurs around July 1, at which time the average daily maximum wind speed is 10 mph (gentle breeze).
The lowest average wind speed of 4 mph (light breeze) occurs around July 25, at which time the average daily maximum wind speed is 10 mph (gentle breeze).