This report describes the typical weather at the Newport News/Williamsburg International Airport (Newport News, 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.
Newport News, 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 (42%), oceans and seas (34%), croplands (10%), built-up areas (8%), and lakes and rivers (6%).
Over the course of a year, the temperature typically varies from 30°F to 89°F and is rarely below 18°F or above 96°F.
The warm season lasts from May 30 to September 18 with an average daily high temperature above 80°F. The hottest day of the year is July 17, with an average high of 89°F and low of 71°F.
The cold season lasts from December 4 to March 3 with an average daily high temperature below 55°F. The coldest day of the year is January 19, with an average low of 30°F and high of 47°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:37 hours of daylight; the longest day is June 20 with 14:43 hours of daylight.
The earliest sunrise is at 5:45am on June 15 and the latest sunset is at 8:30pm on June 25. The latest sunrise is at 7:33am on November 3 and the earliest sunset is at 4:48pm on December 9.
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 47% (partly cloudy) to 63% (partly cloudy). The sky is cloudiest on January 8 and clearest on November 2. The clearer part of the year begins around September 18. The cloudier part of the year begins around December 2.
On November 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 42% of the time.
On January 8, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 58% of the time, and clear or mostly clear 41% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around July 20, occurring in 44% of days. Precipitation is least likely around September 22, occurring in 33% 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 43% of those days with precipitation. It is most likely around March 18, when it is observed during 21% of all days.
Thunderstorms are the most severe precipitation observed during 20% of those days with precipitation. They are most likely around July 22, when it is observed during 23% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around March 12, when it is observed during 9% of all days.
During the warm season, which lasts from May 30 to September 18, there is a 41% 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 (44% of days with precipitation have at worst thunderstorms), light rain (32%), moderate rain (15%), and heavy rain (7%).
During the cold season, which lasts from December 4 to March 3, there is a 42% 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 (46% of days with precipitation have at worst light rain), moderate rain (21%), light snow (11%), and heavy rain (5%).
The likelihood of snow falling is highest around February 2, occurring in 11% of days. The season in which it is relatively likely for snow to fall spans from November 28 to March 27.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 42% (comfortable) to 96% (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 1, at which time the relative humidity drops below 52% (mildly humid) three days out of four; it is most humid around August 30, exceeding 94% (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 20°F (dry) to 74°F (very muggy) and is rarely below 5°F (dry) or above 78°F (oppressive).
There are two periods in the year that are most comfortable: The first is between April 11 and May 31 and the second is between September 23 and November 8. 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 16 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around April 6, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around October 5, at which time the average daily maximum wind speed is 14 mph (moderate breeze).