This report describes the typical weather at the New York City (New York, 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.
New York, New York has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by built-up areas (48%), oceans and seas (22%), forests (16%), grasslands (7%), and lakes and rivers (5%).
The month of April is characterized by rapidly rising daily high temperatures, with daily highs increasing from 53°F to 63°F over the course of the month, exceeding 74°F or dropping below 42°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 1:14 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 13:57 hours of daylight.
The earliest sunrise is at 5:55am on April 30; the latest sunset is at 7:52pm on April 30; the latest sunrise is at 6:39am on April 1; the earliest sunset is at 7:21pm 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 is 80% (mostly cloudy) and does not vary substantially over the course of the month.
On April 15, a representative day, the sky is clear or mostly clear 32% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 52% of the time.
The average probability that some form of precipitation will be observed in a given day is 48%, with little variation over the course of the month.
Throughout April, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 44% of those days with precipitation. It is most likely around April 27, when it is observed during 22% of all days.
Moderate rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around April 25, when it is observed during 14% of all days.
The likelihood of snow falling is highest around April 1, occurring in 11% 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 44% (comfortable) to 87% (very humid) over the course of a typical April, rarely dropping below 22% (dry) and reaching as high as 100% (very humid).
The air is driest around April 15, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around April 30, rising above 79% (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 24°F (dry) to 48°F (dry) and is rarely below 10°F (dry) or above 58°F (comfortable).
Over the course of April typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around April 1, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around April 30, at which time the average daily maximum wind speed is 15 mph (moderate breeze).