This report describes the typical weather at the Wilmington International Airport (Wilmington, North Carolina, 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.
Wilmington, North Carolina 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 (60%), oceans and seas (30%), grasslands (4%), and croplands (4%).
Over the course of a year, the temperature typically varies from 36°F to 89°F and is rarely below 23°F or above 95°F.
The warm season lasts from May 26 to September 19 with an average daily high temperature above 82°F. The hottest day of the year is July 14, with an average high of 89°F and low of 73°F.
The cold season lasts from December 5 to February 28 with an average daily high temperature below 62°F. The coldest day of the year is January 19, with an average low of 36°F and high of 55°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:52 hours of daylight; the longest day is June 20 with 14:26 hours of daylight.
The earliest sunrise is at 5:59am on June 13 and the latest sunset is at 8:28pm on June 27. The latest sunrise is at 7:34am on November 3 and the earliest sunset is at 5:01pm on December 6.
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 25% (mostly clear) to 44% (partly cloudy). The sky is cloudiest on January 8 and clearest on November 11. The clearer part of the year begins around March 18. The cloudier part of the year begins around December 9.
On November 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
On January 8, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 51% of the time, and clear or mostly clear 49% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around July 22, occurring in 51% of days. Precipitation is least likely around October 28, occurring in 30% 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 39% of those days with precipitation. It is most likely around January 3, when it is observed during 21% of all days.
Thunderstorms are the most severe precipitation observed during 33% of those days with precipitation. They are most likely around July 25, when it is observed during 34% of all days.
Moderate rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around January 29, when it is observed during 7% of all days.
During the warm season, which lasts from May 26 to September 19, there is a 46% 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 (59% of days with precipitation have at worst thunderstorms), light rain (24%), moderate rain (9%), and heavy rain (7%).
During the cold season, which lasts from December 5 to February 28, there is a 38% 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 (52% of days with precipitation have at worst light rain), moderate rain (19%), heavy rain (13%), and thunderstorms (7%).
The likelihood of snow falling is highest around February 2, occurring in 3% of days.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 41% (comfortable) to 95% (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 11, at which time the relative humidity drops below 52% (mildly humid) three days out of four; it is most humid around August 20, exceeding 93% (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 26°F (dry) to 76°F (very muggy) and is rarely below 9°F (dry) or above 79°F (oppressive).
There are two periods in the year that are most comfortable: The first is between March 11 and May 18 and the second is between October 4 and December 2. 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 17 mph (calm to moderate breeze), rarely exceeding 23 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 17 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 15, at which time the average daily maximum wind speed is 13 mph (moderate breeze).