This report describes the typical weather at the Charlottesville-Albemarle Airport (Charlottesville, Virginia, 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.
Charlottesville, Virginia has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (99%).
The month of April is characterized by rising daily high temperatures, with daily highs increasing from 63Â°F to 72Â°F over the course of the month, exceeding 84Â°F or dropping below 49Â°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 1:07 hours, implying an average day-over-day increase of 2.2 minutes.
The shortest day of the month is April 1 with 12:39 hours of daylight; the longest day is April 30 with 13:46 hours of daylight.
The earliest sunrise is at 6:18am on April 30; the latest sunset is at 8:04pm on April 30; the latest sunrise is at 6:58am on April 1; the earliest sunset is at 7:37pm 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 51% (partly cloudy) to 56% (partly cloudy).
On April 15, a representative day, the sky is clear or mostly clear 40% of the time, partly cloudy 7% of the time, and mostly cloudy or overcast 42% of the time.
The average probability that some form of precipitation will be observed in a given day is 43%, with little variation over the course of the month.
Throughout April, the most common forms of precipitation are light rain, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around April 17, when it is observed during 21% of all days.
Moderate rain is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around April 10, when it is observed during 11% of all days.
Thunderstorms are the most severe precipitation observed during 18% of those days with precipitation. They are most likely around April 30, when it is observed during 10% of all days.
The likelihood of snow falling is highest around April 1, occurring in 4% 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 36% (comfortable) to 87% (very humid) over the course of a typical April, rarely dropping below 19% (dry) and reaching as high as 100% (very humid).
The air is driest around April 11, at which time the relative humidity drops below 44% (comfortable) 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 28Â°F (dry) to 52Â°F (very comfortable) and is rarely below 13Â°F (dry) or above 64Â°F (mildy humid).
Over the course of April typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around April 7, 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 30, at which time the average daily maximum wind speed is 12 mph (moderate breeze).