Average Weather at Eastern West Virginia Regional Airport West Virginia, United States

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2. United States
3. West Virginia
4. Berkeley County
5. Eastern West Virginia Regional Airport

At Eastern West Virginia Regional Airport, the summers are warm and humid, the winters are chilly, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 87°F and is rarely below 11°F or above 95°F.

The hot season lasts for 3.6 months, from May 29 to September 17, with an average daily high temperature above 77°F. The hottest day of the year is July 21, with an average high of 87°F and low of 66°F.

The cold season lasts for 3.2 months, from November 29 to March 4, with an average daily high temperature below 50°F. The coldest day of the year is January 29, with an average low of 24°F and high of 40°F.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

At Eastern West Virginia Regional Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Eastern West Virginia Regional Airport begins around June 22 and lasts for 4.6 months, ending around November 11. On September 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 66% of the time, and overcast or mostly cloudy 34% of the time.

The cloudier part of the year begins around November 11 and lasts for 7.4 months, ending around June 22. On January 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Eastern West Virginia Regional Airport varies throughout the year.

The wetter season lasts 4.7 months, from April 2 to August 24, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on June 17.

The drier season lasts 7.3 months, from August 24 to April 2. The smallest chance of a wet day is 19% on October 20.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on June 17.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Eastern West Virginia Regional Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Eastern West Virginia Regional Airport. The most rain falls during the 31 days centered around May 19, with an average total accumulation of 3.5 inches.

The least rain falls around January 29, with an average total accumulation of 1.4 inches.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Eastern West Virginia Regional Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.5 months, from November 16 to March 30, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 5, with an average total liquid-equivalent accumulation of 0.8 inches.

The snowless period of the year lasts for 7.5 months, from March 30 to November 16. The least snow falls around July 16, with an average total liquid-equivalent accumulation of 0.0 inches.

The length of the day at Eastern West Virginia Regional Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 23 minutes of daylight; the longest day is June 21, with 14 hours, 57 minutes of daylight.

The earliest sunrise is at 5:44 AM on June 13, and the latest sunrise is 1 hour, 59 minutes later at 7:43 AM on November 4. The earliest sunset is at 4:48 PM on December 7, and the latest sunset is 3 hours, 55 minutes later at 8:42 PM on June 27.

Daylight saving time (DST) is observed at Eastern West Virginia Regional Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Eastern West Virginia Regional Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.8 months, from May 28 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 13% of the time. The muggiest day of the year is July 28, with muggy conditions 53% of the time.

The least muggy day of the year is December 10, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Eastern West Virginia Regional Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from November 11 to May 4, with average wind speeds of more than 3.1 miles per hour. The windiest day of the year is February 26, with an average hourly wind speed of 4.0 miles per hour.

The calmer time of year lasts for 6.2 months, from May 4 to November 11. The calmest day of the year is August 1, with an average hourly wind speed of 2.2 miles per hour.

The predominant average hourly wind direction at Eastern West Virginia Regional Airport varies throughout the year.

The wind is most often from the south for 1.0 months, from August 19 to September 20, with a peak percentage of 32% on September 8. The wind is most often from the west for 11 months, from September 20 to August 19, with a peak percentage of 46% on January 1.

Eastern West Virginia Regional Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences extreme seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.4 months, from June 22 to October 2, with an average temperature above 68°F. The day of the year with the warmest water is August 9, with an average temperature of 76°F.

The time of year with cooler water lasts for 3.4 months, from December 22 to April 5, with an average temperature below 44°F. The day of the year with the coolest water is February 5, with an average temperature of 36°F.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.8 months, from April 29 to August 24, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 23, with an average of 7.0 kWh.

The darker period of the year lasts for 3.2 months, from November 5 to February 10, with an average daily incident shortwave energy per square meter below 3.0 kWh. The darkest day of the year is December 23, with an average of 1.9 kWh.

For the purposes of this report, the geographical coordinates of Eastern West Virginia Regional Airport are 39.402 deg latitude, -77.984 deg longitude, and 525 ft elevation.

The topography within 2 miles of Eastern West Virginia Regional Airport contains only modest variations in elevation, with a maximum elevation change of 302 feet and an average elevation above sea level of 525 feet. Within 10 miles contains only modest variations in elevation (1,512 feet). Within 50 miles contains very significant variations in elevation (3,396 feet).

The area within 2 miles of Eastern West Virginia Regional Airport is covered by cropland (70%), artificial surfaces (17%), and trees (13%), within 10 miles by cropland (61%) and trees (32%), and within 50 miles by trees (57%) and cropland (36%).

This report illustrates the typical weather at Eastern West Virginia Regional Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Eastern West Virginia Regional Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Winchester Regional Airport, Hagerstown Regional Airport, Leesburg Executive Airport, Fort Ritchie, Frederick Municipal Airport, Site R, Washington Dulles International Airport, and Greater Cumberland Regional Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.