This report describes the typical weather at the John Paul II International Airport Kraków-Balice (Kraków, Poland) weather station over the course of an average April. It is based on the historical records from 1985 to 2012. Earlier records are either unavailable or unreliable.
Kraków has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (90%) and grasslands (10%).
The month of April is characterized by rapidly rising daily high temperatures, with daily highs increasing from 52°F to 64°F over the course of the month, exceeding 75°F or dropping below 40°F only one day in ten.
Over the course of April, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1:45 hours, implying an average day-over-day increase of 3.5 minutes.
The shortest day of the month is April 1 with 12:56 hours of daylight; the longest day is April 30 with 14:41 hours of daylight.
The earliest sunrise is at 5:18am on April 30; the latest sunset is at 7:59pm on April 30; the latest sunrise is at 6:17am on April 1; the earliest sunset is at 7:13pm on April 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in April, so the entire month is in daylight time.
The median cloud cover ranges from 72% (partly cloudy) to 81% (mostly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 8% from the start to the end of the month.
On April 15, a representative day, the sky is clear or mostly clear 19% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 34% of the time.
The average probability that some form of precipitation will be observed in a given day is 12%, with little variation over the course of the month.
Throughout April, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 61% of those days with precipitation. It is most likely around April 28, when it is observed during 8% of all days.
Thunderstorms are the most severe precipitation observed during 15% of those days with precipitation. They are most likely around April 30, when it is observed during 3% of all days.
Moderate rain is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around April 28, when it is observed during 2% of all days.
The likelihood of snow falling is highest around April 1, occurring in 3% of days.
Either snow rarely accumulates at this location in April or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 42% (comfortable) to 94% (very humid) over the course of a typical April, rarely dropping below 27% (dry) and reaching as high as 99% (very humid).
The air is driest around April 27, at which time the relative humidity drops below 49% (comfortable) three days out of four; it is most humid around April 9, 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 April, the dew point typically varies from 30°F (dry) to 47°F (dry) and is rarely below 24°F (dry) or above 53°F (very comfortable).
Over the course of April typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around April 2, 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 April 25, at which time the average daily maximum wind speed is 11 mph (gentle breeze).