This report describes the typical weather at the Shenandoah Valley Regional Airport (Staunton, Virginia, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Staunton, 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 (95%) and croplands (3%).
Over the course of a year, the temperature typically varies from 25°F to 87°F and is rarely below 11°F or above 95°F.
The warm season lasts from May 28 to September 17 with an average daily high temperature above 78°F. The hottest day of the year is July 13, with an average high of 87°F and low of 66°F.
The cold season lasts from November 30 to February 29 with an average daily high temperature below 51°F. The coldest day of the year is January 30, with an average low of 25°F and high of 43°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:31 hours of daylight; the longest day is June 20 with 14:49 hours of daylight.
The earliest sunrise is at 5:51am on June 12 and the latest sunset is at 8:43pm on June 28. The latest sunrise is at 7:44am on November 3 and the earliest sunset is at 4:55pm on December 8.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 45% (partly cloudy) to 59% (partly cloudy). The sky is cloudiest on March 17 and clearest on July 23. The clearer part of the year begins around June 8. The cloudier part of the year begins around December 3.
On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 47% of the time, and overcast or mostly cloudy 30% of the time.
On March 17, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 48% of the time, and clear or mostly clear 29% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around June 13, occurring in 36% of days. Precipitation is least likely around October 10, occurring in 23% of days.
Over the entire year, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around April 23, when it is observed during 12% of all days.
Thunderstorms are the most severe precipitation observed during 24% of those days with precipitation. They are most likely around June 26, when it is observed during 18% of all days.
Moderate rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around April 11, when it is observed during 9% of all days.
During the warm season, which lasts from May 28 to September 17, there is a 32% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (45% of days with precipitation have at worst thunderstorms), light rain (30%), moderate rain (15%), and heavy rain (6%).
During the cold season, which lasts from November 30 to February 29, there is a 27% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (28% of days with precipitation have at worst light rain), moderate rain (21%), light snow (20%), and moderate snow (13%).
The likelihood of snow falling is highest around January 29, occurring in 13% of days. The season in which it is relatively likely for snow to fall spans from November 21 to March 30.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 65% (mildly humid) to 99% (very humid) over the course of the year, rarely dropping below 23% (dry) and reaching as high as 100% (very humid).
The air is driest around April 9, at which time the relative humidity drops below 100% (very humid) three days out of four; it is most humid around September 25, exceeding 100% (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 year, the dew point typically varies from 17°F (dry) to 71°F (very muggy) and is rarely below 1°F (dry) or above 76°F (very muggy).
There are two periods in the year that are most comfortable: The first is between April 21 and June 12 and the second is between September 7 and October 23. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around March 30, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 3 mph (light air) occurs around August 9, at which time the average daily maximum wind speed is 9 mph (gentle breeze).