This report describes the typical weather at the Charlottesville-Albemarle Airport (Charlottesville, Virginia, United States) weather station over the course of an average January. 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 January is characterized by essentially constant daily high temperatures, with daily highs around 44Â°F throughout the month, exceeding 61Â°F or dropping below 31Â°F only one day in ten.
Over the course of January, the length of the day is gradually increasing. The shortest day of the month is January 1 with 9:34 hours of daylight; the longest day is January 31 with 10:16 hours of daylight.
The earliest sunrise is at 7:19am on January 31; the latest sunset is at 5:35pm on January 31; the latest sunrise is at 7:31am on January 2; the earliest sunset is at 5:04pm on January 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover is 49% (partly cloudy) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 41% of the time, partly cloudy 5% of the time, and mostly cloudy or overcast 40% of the time.
The average probability that some form of precipitation will be observed in a given day is 38%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are light rain, moderate rain, light snow, and moderate snow.
Light rain is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around January 2, when it is observed during 13% of all days.
Moderate rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around January 5, when it is observed during 9% of all days.
Light snow is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around January 31, when it is observed during 9% of all days.
Moderate snow is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around January 28, when it is observed during 5% of all days.
The likelihood of snow falling is highest around January 31, occurring in 17% of days.
Either snow rarely accumulates at this location in January or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 40% (comfortable) to 82% (humid) over the course of a typical January, rarely dropping below 23% (dry) and reaching as high as 100% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 47% (comfortable) three days out of four; it is most humid around January 1, rising above 69% (mildly 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 January, the dew point typically varies from 14Â°F (dry) to 30Â°F (dry) and is rarely below -3Â°F (dry) or above 48Â°F (dry).
Over the course of January typical wind speeds vary from 0 mph to 12 mph (calm to moderate breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around January 22, at which time the average daily maximum wind speed is 12 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around January 1, at which time the average daily maximum wind speed is 12 mph (gentle breeze).