This report describes the typical weather at the Cleveland Hopkins International Airport (Cleveland, Ohio, United States) weather station over the course of an average April. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Cleveland, Ohio has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (33%), croplands (22%), forests (19%), built-up areas (18%), and grasslands (9%).
The month of April is characterized by rapidly rising daily high temperatures, with daily highs increasing from 52°F to 63°F over the course of the month, exceeding 77°F or dropping below 37°F only one day in ten.
Over the course of April, 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 April 1 with 12:43 hours of daylight; the longest day is April 30 with 13:59 hours of daylight.
The earliest sunrise is at 6:25am on April 30; the latest sunset is at 8:25pm on April 30; the latest sunrise is at 7:10am on April 1; the earliest sunset is at 7:53pm 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 88% (mostly cloudy) to 94% (mostly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 6% from the start to the end of the month.
On April 15, a representative day, the sky is clear or mostly clear 27% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 59% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around April 1, occurring in 61% of days. Precipitation is least likely around April 30, occurring in 56% of days.
Throughout April, the most common forms of precipitation are light rain, moderate rain, light snow, and thunderstorms.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around April 26, when it is observed during 21% of all days.
Moderate rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around April 28, when it is observed during 15% of all days.
Light snow is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around April 1, when it is observed during 16% 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 11% of all days.
The likelihood of snow falling is highest around April 1, occurring in 24% of days.
Accumulation at this location in April is unlikely. The chances of there being snow on the ground are highest around April 1, occurring 12% of the time.
The snow is typically at its deepest on April 26, with a median depth of 3.2"; the depth exceeds 4.4" only one year out of ten.
The relative humidity typically ranges from 45% (comfortable) to 87% (very humid) over the course of a typical April, rarely dropping below 27% (dry) and reaching as high as 100% (very humid).
The air is driest around April 20, at which time the relative humidity drops below 55% (mildly humid) three days out of four; it is most humid around April 1, rising above 80% (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 26°F (dry) to 48°F (dry) and is rarely below 14°F (dry) or above 60°F (comfortable).
Over the course of April typical wind speeds vary from 3 mph to 18 mph (light air to fresh breeze), rarely exceeding 27 mph (strong breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around April 7, at which time the average daily maximum wind speed is 18 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around April 28, at which time the average daily maximum wind speed is 16 mph (moderate breeze).