This report describes the typical weather at the Charlottesville-Albemarle Airport (Charlottesville, Virginia, United States) weather station over the course of an average October. 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 October is characterized by rapidly falling daily high temperatures, with daily highs decreasing from 73Â°F to 64Â°F over the course of the month, exceeding 82Â°F or dropping below 52Â°F only one day in ten.
Over the course of October, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:10 hours, implying an average day-over-day decrease of 2.3 minutes.
The shortest day of the month is October 31 with 10:36 hours of daylight; the longest day is October 1 with 11:46 hours of daylight.
The earliest sunrise is at 7:10am on October 1; the latest sunset is at 6:56pm on October 1; the latest sunrise is at 7:40am on October 31; the earliest sunset is at 6:15pm on October 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in October, so the entire month is in daylight time.
The median cloud cover is 40% (partly cloudy) and does not vary substantially over the course of the month.
On October 16, a representative day, the sky is clear or mostly clear 43% of the time, partly cloudy 6% of the time, and mostly cloudy or overcast 37% of the time.
The average probability that some form of precipitation will be observed in a given day is 33%, with little variation over the course of the month.
Throughout October, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around October 17, when it is observed during 16% of all days.
Moderate rain is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around October 20, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in October or this station does not reliably report precipitation types.
The relative humidity typically ranges from 43% (comfortable) to 93% (very humid) over the course of a typical October, rarely dropping below 24% (dry) and reaching as high as 100% (very humid).
The air is driest around October 31, at which time the relative humidity drops below 51% (mildly humid) three days out of four; it is most humid around October 1, rising above 90% (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 October, the dew point typically varies from 34Â°F (dry) to 58Â°F (comfortable) and is rarely below 21Â°F (dry) or above 68Â°F (muggy).
Over the course of October typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 17 mph (moderate breeze).
The highest average wind speed of 5 mph (light breeze) occurs around October 31, at which time the average daily maximum wind speed is 12 mph (gentle breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around October 4, at which time the average daily maximum wind speed is 11 mph (gentle breeze).