Average Weather at Bowerman Airport Washington, United States

1. World
2. United States
3. Washington
4. Grays Harbor County
5. Bowerman Airport

At Bowerman Airport, the summers are comfortable and partly cloudy and the winters are chilly, wet, and mostly cloudy. Over the course of the year, the temperature typically varies from 38°F to 68°F and is rarely below 29°F or above 78°F.

The warm season lasts for 3.5 months, from June 17 to October 2, with an average daily high temperature above 64°F. The hottest day of the year is August 18, with an average high of 68°F and low of 54°F.

The cool season lasts for 3.1 months, from November 19 to February 21, with an average daily high temperature below 51°F. The coldest day of the year is December 23, with an average low of 38°F and high of 46°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 Bowerman Airport, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year at Bowerman Airport begins around June 12 and lasts for 3.9 months, ending around October 8. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 76% of the time, and overcast or mostly cloudy 24% of the time.

The cloudier part of the year begins around October 8 and lasts for 8.1 months, ending around June 12. On January 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% 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 Bowerman Airport varies very significantly throughout the year.

The wetter season lasts 6.7 months, from October 8 to April 28, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 63% on November 18.

The drier season lasts 5.4 months, from April 28 to October 8. The smallest chance of a wet day is 6% on August 1.

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 63% on November 18.

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. Bowerman Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Bowerman Airport. The most rain falls during the 31 days centered around November 24, with an average total accumulation of 12.0 inches.

The least rain falls around July 29, with an average total accumulation of 0.6 inches.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall at Bowerman Airport does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

The length of the day at Bowerman Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 31 minutes of daylight; the longest day is June 21, with 15 hours, 54 minutes of daylight.

The earliest sunrise is at 5:20 AM on June 15, and the latest sunrise is 2 hours, 43 minutes later at 8:03 AM on November 4. The earliest sunset is at 4:26 PM on December 10, and the latest sunset is 4 hours, 48 minutes later at 9:14 PM on June 25.

Daylight saving time (DST) is observed at Bowerman 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.

The perceived humidity level at Bowerman Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

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 Bowerman Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.7 months, from October 21 to April 13, with average wind speeds of more than 3.6 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 4.6 miles per hour.

The calmer time of year lasts for 6.3 months, from April 13 to October 21. The calmest day of the year is August 20, with an average hourly wind speed of 2.8 miles per hour.

The predominant average hourly wind direction at Bowerman Airport varies throughout the year.

The wind is most often from the south for 1.5 months, from February 17 to April 3 and for 2.1 months, from October 6 to December 10, with a peak percentage of 40% on November 12. The wind is most often from the west for 6.1 months, from April 3 to October 6, with a peak percentage of 63% on August 6. The wind is most often from the east for 2.2 months, from December 10 to February 17, with a peak percentage of 38% on January 1.

Bowerman 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.7 months, from June 14 to October 4, with an average temperature above 56°F. The day of the year with the warmest water is August 28, with an average temperature of 58°F.

The time of year with cooler water lasts for 3.8 months, from December 8 to April 3, with an average temperature below 50°F. The day of the year with the coolest water is January 31, with an average temperature of 48°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 3.1 months, from May 19 to August 23, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is July 16, with an average of 6.9 kWh.

The darker period of the year lasts for 4.0 months, from October 24 to February 23, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest day of the year is December 26, with an average of 0.9 kWh.

For the purposes of this report, the geographical coordinates of Bowerman Airport are 46.971 deg latitude, -123.937 deg longitude, and 0 ft elevation.

The topography within 2 miles of Bowerman Airport contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 29 feet. Within 10 miles contains only modest variations in elevation (827 feet). Within 50 miles contains very significant variations in elevation (5,866 feet).

The area within 2 miles of Bowerman Airport is covered by water (45%), herbaceous vegetation (26%), and trees (21%), within 10 miles by trees (52%) and water (26%), and within 50 miles by trees (45%) and water (39%).

This report illustrates the typical weather at Bowerman 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

Bowerman 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 Clatsop County Airport, Sanderson Field, Chehalis-Centralia Airport, Olympia Regional Airport, Quillayute Airport, Bremerton National Airport, Southwest Washington Regional Airport, and Madigan Hospital Heliport.

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.